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? ?阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}}? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?...
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{{*HTML*}}阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断如果该句提供的是正确信息请选择A如果该句提供的是错误信息请选择B如果该句的信息文章中没有提及请选择C ??There’ssimplepremisebehindwhat LarryMyersdoesforaliving:Ifyoucansmellityoucanfindit.? ?MyersisthefounderofAuburnUniversity’sInstituteforBiological DetectionSystemsthemaintaskofwhichistochasetheultimateindetection devices--anartificialnose.??Fornowthesubjectoftheir researchislittlemorethanastackofgleamingchipstuckedawayina laboratorydrawer.Butsoonsuchatoolcouldbehangingfromthebeltsof policearson纵火investigatorsandfood-safetyinspectors.??The technologythattheyareworkingonwouldsuggestquitereasonablethatwithin threetofiveyearswe’llhavesomeworkablesensorsreadytouse.Suchdevices mightfindwideuseinplacesthatattractterrorists.Policecoulddetect drugsbodiesandbombshiddenincarswhilefoodinspectorscouldeasilytest foodandwaterforcontamination.??Theimplicationsfor revolutionaryadvancesinpublicsafetyandthefoodindustryareastonishing. Butsotooarethepossibilitiesforabuse:Suchmachinescoulddetermine whetherawomanisovulating排卵withoutaphysicalexam--orevenher knowledge??OneofthetraditionalprotectorsofAmericanliberty isthatithasbeenimpossibletosearcheveryone.That’sgettingnottobethe case.??ArtificialbiosensorscreatedatAuburnworktotally differentlyfromanythingeverseenbefore.AromaScanforexampleisadesktop machinebasedonabankofchipssensitivetospecificchemicalsthatevaporate intotheair.Asairissuckedintothemachinechemicalspassoverthesensor surfacesandproducechangesintheelectricalcurrentflowingthroughthem. Thosecurrentchangesareloggedintoacomputerthatsortsourodorsbasedon theirelectricalsignatures.??Myerssaystheyexpecttoloada singlefingernail-sizechipwiththousandsofodorreceptors感受器enoughto createasensorthat’snearlyassensitiveasadog’s nose.Theartificialnosecanbeusedtodetectdrugsandwatercontamination.
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案 ?{{B}}第一篇{{/B}} ??Itishardtopredicthowscienceis goingtoturnoutandifitisreallygoodscienceitisimpossibletopredict. Ifthethingstobefoundareactuallynewtheyarebydefinitionunknownin advance.Youcannotmakechoicesinthismatter.Youeitherhavescienceoryou don’tandifyouhaveityouareobligedtoacceptthesurprisingand disturbingpiecesofinformation?alongwiththeneatandpromptlyuseful hits??TheonlysolidpieceofscientifictruthabutwhichIfeel totallyconfidentisthatweareprofoundlyignorantaboutnature.IndeedI regardthisasthemajordiscoveryofthepasthundredyearsofbiology.Itis initswayanilluminatingpieceofnews.Itwouldhaveamazedthebrightest mindsofthe18th.centuryEnlightenmenttobetoldbyanyofushowlittlewe knowandhowbewilderingseemsthewayahead.Itisthissuddenconfrontation withthedepthandscopeofignorancethatrepresentsthemostsignificant contributionofthe20thcenturyscience?tothehumanintellect.In earliertimesweeitherpretendedtounderstandhowthingsworkedorignored theproblemorsimplymadeupstoriestofillthegaps.Nowthatwehavebegun exploringinearnestwearegettingglimpsesofhowhugethequestionsareand howfarfrombeinganswered.Becauseofthiswearedepressed.Itisnotsobad beingignorantifyouaretotallyignorant;thehardthingisknowinginsome detailtherealityofignorancetheworstspotsandhereandtherethe not-so-badspotsbutnotruelightattheendofthetunnelnorevenany tunnelsthatcanyetbetrusted.??Butwearemakingabeginning andthereoughttobesomesatisfaction.Thereareprobablynoquestionswecan thinkupthatcan’tbeansweredsoonerorlaterincludingeventhematterof consciousness.Tobesuretheremaywellbequestionswecan’tthinkupand therefore?limitstothereachofhumanintellectbutthatisanother matter.Withinourlimitsweshouldbeabletoworkourwaythroughtoallour answersifwekeepatitlongenoughandpay attention.Theauthorbelievesthat______.
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{{*HTML*}}{{B}}第三篇{{/B}} ??Archaeologyhaslongbeenanaccepted toolforstudyingprehistoriccultures.Relativelyrecentlythesametechniques havebeensystematicallyappliedtostudiesofthemoreimmediatepast.Thishas beencalledhistoricalarchaeologyatermthatisusedintheUnitedStates torefertoanyarchaeologicalinvestigationintoNorthAmericansitesthat postdatethearrivalofEuropeans.??Backinthe1930’sand 1940’swhenbuildingrestorationwaspopularhistoricalarchaeologywas primarilyatoolofarchitecturalreconstruction.Theroleofarchaeologistswas tofindthefoundationsofhistoricbuildingsandthentakeabackseatto architects.??Themaniaforreconstructionhadlargelysubsidedby the1950’sand1960’s.Mostpeopleenteringhistoricalarchaeologyduringthis periodcameoutofuniversityanthropologydepartmentswheretheyhadstudied prehistoriccultures.Theywerebytrainingsocialscientistsnothistorians andtheirworktendedtoreflectthisbias.Thequestionstheyframedandthe techniquestheyusedweredesignedtohelpthemunderstandasscientistshow peoplebehaved.?Butbecausetheyweretreading踩踏onhistoricalground forwhichtherewasoftenextensivewrittendocumentationandbecausetheirown knowledgeoftheseperiodswasusuallylimitedtheircontributionstoAmerican historyremainedcircumscribed.Theirreportshighlytechnicalandsometimes poorlywrittenwentunread.??Morerecentlyprofessional archaeologistshavetakenover.Theseresearchershavesoughttodemonstrate thattheirworkcanbeavaluabletoolnotonlyofsciencebutalsoofhistory providingfreshinsightsintothedailylivesofordinarypeoplewhose existencesmightntotherwisebesowelldocumented.Thisneweremphasison archaeologyassocialhistoryhasshowngreatpromiseandindeedworkdonein thisareahasledtoareinterpretationoftheUnitedStates’past.? ?InKingstonNewYorkforexampleevidencehasbeenuncoveredthat indicatesthatEnglishgoodswerebeingsmuggledintothatcityatatimewhen theDutchsupposedlycontrolledtradinginthearea.AndinSacramentoan excavationatthesiteofafashionablenineteenth-century?hotelrevealed thatgarbagehadbeenstashed存放inthebuilding’sbasementdespitesanitation lawstothecontrary.Whatisthemaintopicofthepassage?
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
{{*HTML*}}{{B}}第三篇{{/B}} ??Archaeologyhaslongbeenanaccepted toolforstudyingprehistoriccultures.Relativelyrecentlythesametechniques havebeensystematicallyappliedtostudiesofthemoreimmediatepast.Thishas beencalledhistoricalarchaeologyatermthatisusedintheUnitedStates torefertoanyarchaeologicalinvestigationintoNorthAmericansitesthat postdatethearrivalofEuropeans.??Backinthe1930’sand 1940’swhenbuildingrestorationwaspopularhistoricalarchaeologywas primarilyatoolofarchitecturalreconstruction.Theroleofarchaeologistswas tofindthefoundationsofhistoricbuildingsandthentakeabackseatto architects.??Themaniaforreconstructionhadlargelysubsidedby the1950’sand1960’s.Mostpeopleenteringhistoricalarchaeologyduringthis periodcameoutofuniversityanthropologydepartmentswheretheyhadstudied prehistoriccultures.Theywerebytrainingsocialscientistsnothistorians andtheirworktendedtoreflectthisbias.Thequestionstheyframedandthe techniquestheyusedweredesignedtohelpthemunderstandasscientistshow peoplebehaved.?Butbecausetheyweretreading踩踏onhistoricalground forwhichtherewasoftenextensivewrittendocumentationandbecausetheirown knowledgeoftheseperiodswasusuallylimitedtheircontributionstoAmerican historyremainedcircumscribed.Theirreportshighlytechnicalandsometimes poorlywrittenwentunread.??Morerecentlyprofessional archaeologistshavetakenover.Theseresearchershavesoughttodemonstrate thattheirworkcanbeavaluabletoolnotonlyofsciencebutalsoofhistory providingfreshinsightsintothedailylivesofordinarypeoplewhose existencesmightntotherwisebesowelldocumented.Thisneweremphasison archaeologyassocialhistoryhasshowngreatpromiseandindeedworkdonein thisareahasledtoareinterpretationoftheUnitedStates’past.? ?InKingstonNewYorkforexampleevidencehasbeenuncoveredthat indicatesthatEnglishgoodswerebeingsmuggledintothatcityatatimewhen theDutchsupposedlycontrolledtradinginthearea.AndinSacramentoan excavationatthesiteofafashionablenineteenth-century?hotelrevealed thatgarbagehadbeenstashed存放inthebuilding’sbasementdespitesanitation lawstothecontrary.Accordingtothepassagewhenhadhistoricalarchaeologistsbeentrainedasanthropologists?
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ??Everyyearthousandsofgreywhalesmakethelongest migrationofanyanimaltraveling7000mileseachwaybetweentheArcticand BajaCalifornia.ThegreywhalesspendthelongsummerdaysintheirArctic feedinggroundsintheBeringSeabetweenAlaskaandRussia.Unlikeafishthe whaleiswarm-bloodedandmustthereforemaintainarelativelyhighinternal bodytemperature.InthecoldArcticwatersthegreywhaleisprotectedbyan outerlayerofblubberwhichaveragessixinchesinthickness.Otherwhalessuch astheGreenlandNightwhalehavebeenfoundwithatwo-footthicklayerof blubbercoveringtheirbodies.2.??Duringthesesummermonths intheArcticthegreywhalesfattenthemselvesbyconsumingenormousquantities ofsmallshrimp-likeanimalscalledamphipods.Recentobservationsofayoung greywhaleGigiⅡheldincaptivityatSeaWorldinSanDiegoduring1971and 1972suggestthatthegreywhalefeedsbysweepingitsenormousheadoverthe bottom.Theamphipodsonwhichitfeedsareeitherstirredoffthebottomor leapoffthebottomtoescape.Theseanimalsandthesurroundingwaterare suckedintothewhale’smouth.Asthewaterisexpelledfromthemouthit passesthroughcoarsebaleenfibres.Thesmallanimalsaretrappedand swallowed.3.??InOctoberasthedaysgetshorterandicebegins toformovertheArcticfeedinggroundstheCaliforniagreywhalebeginsits longjourneysouthtothewarmwatersofBajaCalifornia.Duringthis three-monthlongtripthewhalestravellingingroupsstayclosetotheshoreof NorthAmericaswimmingbothdayandnightandaveragingabut100milesper day.4??Duringthetripsouththegreywhalesthataresexually matureatleastthreeyearsoldandnotpregnantalreadyformmatinggroups. Thesegroupsarecomposedofthreewhalestwomalesandafemale.Thedominant malecoupleswiththefemalewhilethesecondmaleiskeptbusypositioningthe twowhalesontheirsidesfacingeachotherandkeepingthemtogetherduringthe sexact.Thisisnosmalljobsinceeachwhalecanbefiftyfeetlongandweigh fortytons.5.??DuringDecemberandJanuarythegreywhales arriveatthewarmlagoonsalongthecoastofBajaCalifornia.Thewhalesswim milesinlandalongnarrowshallowchannels.Thesechannelsarethebreeding groundsoftheCaliforniagreywhale.Thecalfhasbeengestatinginthe pregnantfemaleforthelastthirteenmonthsthatissinceherlastjourney south.Theexpectantcowisaidedinthebirthofthecalfbyanotherfemale thatactsasamidwife.Atbirththecalfsinkstowardtheseafloor.Beinga mammalthewhalemustbreatheatthesurface.Themidwifeguidesthebabywhale tothesurfaceforitsfirstgulpofair.Thecalfthenfindsitsmother’s nipplesandrichwhalemilkisforcedintoitsmouth.Duringthenexttwomonths thecalfwillgrowtwentyfeetanddoubleitsweight.6.??In MarchthewhalesbegintheirlongjourneynorthtotheArctic.The newly-pregnantfemalesleavefirstfollowingbythemalesandimmaturefemales. ThelasttoleavethewarmwatersofBajaarethefemalesandtheircalves.The whalesarriveattheirArcticfeedinggroundinJune.Manyscientistsbelieve thatduringthisentireeightmonthlong14000milejourneytheCalifornia greywhaledoesnotfeedatall!Amatinggroupconsistsof______.
{{*HTML*}}{{B}}第二篇{{/B}} ??Geologistshavebeenstudyingvolcanoes foralongtime.Thoughtheyhavelearnedagreatdealtheystillhavenot discoveredthecauseofvolcanicaction.Theyknowthattheinsideoftheearth isveryhotbuttheyarenotsureexactlywhatcausesthegreatheat.Some geologistshavethoughtthattheheatiscausedbythegreatpressureofthe earth’souterlayers.Ortheheatmaybeleftfromthetimewhentheearthwas formed.Duringthelastsixtyyearsscientistshavelearnedaboutradium uraniumthoriumandotherradioactiveelements.Thesegiveoutheatallthe timeastheychangeintootherelements.Manyscientistsnowbelievethatmuch oftheheatinsidetheearthisproducedbyradioactiveelements.? ?Whateverthecauseoftheheatmaybewedoknowthattheearthgets hotterthefartherdownwedig.Indeepminesandoilwellsthetemperature risesabout1Fforeach50feet.Atthisratethetemperature40milesbelow theearth’ssurfacewouldbeover4000FThisismuchhotterthannecessary tomeltrock.Howeverthepressureoftherockabovekeepsmostmaterialsfrom meltingattheirusualmeltingpoints.Geologistsbelievethattherockdeepin theearthmaybeplasticorputtylike.Inotherwordstherockyieldsslowly topressurebutisnotliquid.Butifsomechangeintheearth’scrustreleases thepressuretherockmelts.Thenthehotliquidrockcanmoveuptowardthe surface.??Whenthemeltedrockworksitswayclosetoearth’s crustavolcanomaybeformed.Themeltedrockoftencontainssteamandother gasesundergreatpressure.Iftherockabovegiveswaythepressureis released.Thenthesuddenexpansionofthegasescausesexplosions.Thesesblow themeltedrockintopiecesofdifferentsizesandshootthemhighintheair. Heretheycoolandhardenintovolcanicashandcinders.Someofthematerial fallsaroundtheholemadeintheearth’ssurface.Themeltedrockmaykeepon risingandpouroutaslava.Inthiswayvolcanicashcindersandlavabuild upthecone-shapedmountainsthatwecall volcanoes.WhichofthefollowingstatementsisNOTtrueaccordingtothepassage?
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ??Everyyearthousandsofgreywhalesmakethelongest migrationofanyanimaltraveling7000mileseachwaybetweentheArcticand BajaCalifornia.ThegreywhalesspendthelongsummerdaysintheirArctic feedinggroundsintheBeringSeabetweenAlaskaandRussia.Unlikeafishthe whaleiswarm-bloodedandmustthereforemaintainarelativelyhighinternal bodytemperature.InthecoldArcticwatersthegreywhaleisprotectedbyan outerlayerofblubberwhichaveragessixinchesinthickness.Otherwhalessuch astheGreenlandNightwhalehavebeenfoundwithatwo-footthicklayerof blubbercoveringtheirbodies.2.??Duringthesesummermonths intheArcticthegreywhalesfattenthemselvesbyconsumingenormousquantities ofsmallshrimp-likeanimalscalledamphipods.Recentobservationsofayoung greywhaleGigiⅡheldincaptivityatSeaWorldinSanDiegoduring1971and 1972suggestthatthegreywhalefeedsbysweepingitsenormousheadoverthe bottom.Theamphipodsonwhichitfeedsareeitherstirredoffthebottomor leapoffthebottomtoescape.Theseanimalsandthesurroundingwaterare suckedintothewhale’smouth.Asthewaterisexpelledfromthemouthit passesthroughcoarsebaleenfibres.Thesmallanimalsaretrappedand swallowed.3.??InOctoberasthedaysgetshorterandicebegins toformovertheArcticfeedinggroundstheCaliforniagreywhalebeginsits longjourneysouthtothewarmwatersofBajaCalifornia.Duringthis three-monthlongtripthewhalestravellingingroupsstayclosetotheshoreof NorthAmericaswimmingbothdayandnightandaveragingabut100milesper day.4??Duringthetripsouththegreywhalesthataresexually matureatleastthreeyearsoldandnotpregnantalreadyformmatinggroups. Thesegroupsarecomposedofthreewhalestwomalesandafemale.Thedominant malecoupleswiththefemalewhilethesecondmaleiskeptbusypositioningthe twowhalesontheirsidesfacingeachotherandkeepingthemtogetherduringthe sexact.Thisisnosmalljobsinceeachwhalecanbefiftyfeetlongandweigh fortytons.5.??DuringDecemberandJanuarythegreywhales arriveatthewarmlagoonsalongthecoastofBajaCalifornia.Thewhalesswim milesinlandalongnarrowshallowchannels.Thesechannelsarethebreeding groundsoftheCaliforniagreywhale.Thecalfhasbeengestatinginthe pregnantfemaleforthelastthirteenmonthsthatissinceherlastjourney south.Theexpectantcowisaidedinthebirthofthecalfbyanotherfemale thatactsasamidwife.Atbirththecalfsinkstowardtheseafloor.Beinga mammalthewhalemustbreatheatthesurface.Themidwifeguidesthebabywhale tothesurfaceforitsfirstgulpofair.Thecalfthenfindsitsmother’s nipplesandrichwhalemilkisforcedintoitsmouth.Duringthenexttwomonths thecalfwillgrowtwentyfeetanddoubleitsweight.6.??In MarchthewhalesbegintheirlongjourneynorthtotheArctic.The newly-pregnantfemalesleavefirstfollowingbythemalesandimmaturefemales. ThelasttoleavethewarmwatersofBajaarethefemalesandtheircalves.The whalesarriveattheirArcticfeedinggroundinJune.Manyscientistsbelieve thatduringthisentireeightmonthlong14000milejourneytheCalifornia greywhaledoesnotfeedatall!Paragraph3______
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案 ?{{B}}第一篇{{/B}} ??Itishardtopredicthowscienceis goingtoturnoutandifitisreallygoodscienceitisimpossibletopredict. Ifthethingstobefoundareactuallynewtheyarebydefinitionunknownin advance.Youcannotmakechoicesinthismatter.Youeitherhavescienceoryou don’tandifyouhaveityouareobligedtoacceptthesurprisingand disturbingpiecesofinformation?alongwiththeneatandpromptlyuseful hits??TheonlysolidpieceofscientifictruthabutwhichIfeel totallyconfidentisthatweareprofoundlyignorantaboutnature.IndeedI regardthisasthemajordiscoveryofthepasthundredyearsofbiology.Itis initswayanilluminatingpieceofnews.Itwouldhaveamazedthebrightest mindsofthe18th.centuryEnlightenmenttobetoldbyanyofushowlittlewe knowandhowbewilderingseemsthewayahead.Itisthissuddenconfrontation withthedepthandscopeofignorancethatrepresentsthemostsignificant contributionofthe20thcenturyscience?tothehumanintellect.In earliertimesweeitherpretendedtounderstandhowthingsworkedorignored theproblemorsimplymadeupstoriestofillthegaps.Nowthatwehavebegun exploringinearnestwearegettingglimpsesofhowhugethequestionsareand howfarfrombeinganswered.Becauseofthiswearedepressed.Itisnotsobad beingignorantifyouaretotallyignorant;thehardthingisknowinginsome detailtherealityofignorancetheworstspotsandhereandtherethe not-so-badspotsbutnotruelightattheendofthetunnelnorevenany tunnelsthatcanyetbetrusted.??Butwearemakingabeginning andthereoughttobesomesatisfaction.Thereareprobablynoquestionswecan thinkupthatcan’tbeansweredsoonerorlaterincludingeventhematterof consciousness.Tobesuretheremaywellbequestionswecan’tthinkupand therefore?limitstothereachofhumanintellectbutthatisanother matter.Withinourlimitsweshouldbeabletoworkourwaythroughtoallour answersifwekeepatitlongenoughandpay attention.Accordingtotheauthorreallygoodscience______.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案 ?{{B}}第一篇{{/B}} ??Itishardtopredicthowscienceis goingtoturnoutandifitisreallygoodscienceitisimpossibletopredict. Ifthethingstobefoundareactuallynewtheyarebydefinitionunknownin advance.Youcannotmakechoicesinthismatter.Youeitherhavescienceoryou don’tandifyouhaveityouareobligedtoacceptthesurprisingand disturbingpiecesofinformation?alongwiththeneatandpromptlyuseful hits??TheonlysolidpieceofscientifictruthabutwhichIfeel totallyconfidentisthatweareprofoundlyignorantaboutnature.IndeedI regardthisasthemajordiscoveryofthepasthundredyearsofbiology.Itis initswayanilluminatingpieceofnews.Itwouldhaveamazedthebrightest mindsofthe18th.centuryEnlightenmenttobetoldbyanyofushowlittlewe knowandhowbewilderingseemsthewayahead.Itisthissuddenconfrontation withthedepthandscopeofignorancethatrepresentsthemostsignificant contributionofthe20thcenturyscience?tothehumanintellect.In earliertimesweeitherpretendedtounderstandhowthingsworkedorignored theproblemorsimplymadeupstoriestofillthegaps.Nowthatwehavebegun exploringinearnestwearegettingglimpsesofhowhugethequestionsareand howfarfrombeinganswered.Becauseofthiswearedepressed.Itisnotsobad beingignorantifyouaretotallyignorant;thehardthingisknowinginsome detailtherealityofignorancetheworstspotsandhereandtherethe not-so-badspotsbutnotruelightattheendofthetunnelnorevenany tunnelsthatcanyetbetrusted.??Butwearemakingabeginning andthereoughttobesomesatisfaction.Thereareprobablynoquestionswecan thinkupthatcan’tbeansweredsoonerorlaterincludingeventhematterof consciousness.Tobesuretheremaywellbequestionswecan’tthinkupand therefore?limitstothereachofhumanintellectbutthatisanother matter.Withinourlimitsweshouldbeabletoworkourwaythroughtoallour answersifwekeepatitlongenoughandpay attention.WhichofthefollowingisNOTmentionedabutscientistsinearliertimes?
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ??Everyyearthousandsofgreywhalesmakethelongest migrationofanyanimaltraveling7000mileseachwaybetweentheArcticand BajaCalifornia.ThegreywhalesspendthelongsummerdaysintheirArctic feedinggroundsintheBeringSeabetweenAlaskaandRussia.Unlikeafishthe whaleiswarm-bloodedandmustthereforemaintainarelativelyhighinternal bodytemperature.InthecoldArcticwatersthegreywhaleisprotectedbyan outerlayerofblubberwhichaveragessixinchesinthickness.Otherwhalessuch astheGreenlandNightwhalehavebeenfoundwithatwo-footthicklayerof blubbercoveringtheirbodies.2.??Duringthesesummermonths intheArcticthegreywhalesfattenthemselvesbyconsumingenormousquantities ofsmallshrimp-likeanimalscalledamphipods.Recentobservationsofayoung greywhaleGigiⅡheldincaptivityatSeaWorldinSanDiegoduring1971and 1972suggestthatthegreywhalefeedsbysweepingitsenormousheadoverthe bottom.Theamphipodsonwhichitfeedsareeitherstirredoffthebottomor leapoffthebottomtoescape.Theseanimalsandthesurroundingwaterare suckedintothewhale’smouth.Asthewaterisexpelledfromthemouthit passesthroughcoarsebaleenfibres.Thesmallanimalsaretrappedand swallowed.3.??InOctoberasthedaysgetshorterandicebegins toformovertheArcticfeedinggroundstheCaliforniagreywhalebeginsits longjourneysouthtothewarmwatersofBajaCalifornia.Duringthis three-monthlongtripthewhalestravellingingroupsstayclosetotheshoreof NorthAmericaswimmingbothdayandnightandaveragingabut100milesper day.4??Duringthetripsouththegreywhalesthataresexually matureatleastthreeyearsoldandnotpregnantalreadyformmatinggroups. Thesegroupsarecomposedofthreewhalestwomalesandafemale.Thedominant malecoupleswiththefemalewhilethesecondmaleiskeptbusypositioningthe twowhalesontheirsidesfacingeachotherandkeepingthemtogetherduringthe sexact.Thisisnosmalljobsinceeachwhalecanbefiftyfeetlongandweigh fortytons.5.??DuringDecemberandJanuarythegreywhales arriveatthewarmlagoonsalongthecoastofBajaCalifornia.Thewhalesswim milesinlandalongnarrowshallowchannels.Thesechannelsarethebreeding groundsoftheCaliforniagreywhale.Thecalfhasbeengestatinginthe pregnantfemaleforthelastthirteenmonthsthatissinceherlastjourney south.Theexpectantcowisaidedinthebirthofthecalfbyanotherfemale thatactsasamidwife.Atbirththecalfsinkstowardtheseafloor.Beinga mammalthewhalemustbreatheatthesurface.Themidwifeguidesthebabywhale tothesurfaceforitsfirstgulpofair.Thecalfthenfindsitsmother’s nipplesandrichwhalemilkisforcedintoitsmouth.Duringthenexttwomonths thecalfwillgrowtwentyfeetanddoubleitsweight.6.??In MarchthewhalesbegintheirlongjourneynorthtotheArctic.The newly-pregnantfemalesleavefirstfollowingbythemalesandimmaturefemales. ThelasttoleavethewarmwatersofBajaarethefemalesandtheircalves.The whalesarriveattheirArcticfeedinggroundinJune.Manyscientistsbelieve thatduringthisentireeightmonthlong14000milejourneytheCalifornia greywhaledoesnotfeedatall!Alayerofblubberapproximatelysixinchesthick______.
{{*HTML*}}阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断如果该句提供的是正确信息请选择A如果该句提供的是错误信息请选择B如果该句的信息文章中没有提及请选择C ??There’ssimplepremisebehindwhat LarryMyersdoesforaliving:Ifyoucansmellityoucanfindit.? ?MyersisthefounderofAuburnUniversity’sInstituteforBiological DetectionSystemsthemaintaskofwhichistochasetheultimateindetection devices--anartificialnose.??Fornowthesubjectoftheir researchislittlemorethanastackofgleamingchipstuckedawayina laboratorydrawer.Butsoonsuchatoolcouldbehangingfromthebeltsof policearson纵火investigatorsandfood-safetyinspectors.??The technologythattheyareworkingonwouldsuggestquitereasonablethatwithin threetofiveyearswe’llhavesomeworkablesensorsreadytouse.Suchdevices mightfindwideuseinplacesthatattractterrorists.Policecoulddetect drugsbodiesandbombshiddenincarswhilefoodinspectorscouldeasilytest foodandwaterforcontamination.??Theimplicationsfor revolutionaryadvancesinpublicsafetyandthefoodindustryareastonishing. Butsotooarethepossibilitiesforabuse:Suchmachinescoulddetermine whetherawomanisovulating排卵withoutaphysicalexam--orevenher knowledge??OneofthetraditionalprotectorsofAmericanliberty isthatithasbeenimpossibletosearcheveryone.That’sgettingnottobethe case.??ArtificialbiosensorscreatedatAuburnworktotally differentlyfromanythingeverseenbefore.AromaScanforexampleisadesktop machinebasedonabankofchipssensitivetospecificchemicalsthatevaporate intotheair.Asairissuckedintothemachinechemicalspassoverthesensor surfacesandproducechangesintheelectricalcurrentflowingthroughthem. Thosecurrentchangesareloggedintoacomputerthatsortsourodorsbasedon theirelectricalsignatures.??Myerssaystheyexpecttoloada singlefingernail-sizechipwiththousandsofodorreceptors感受器enoughto createasensorthat’snearlyassensitiveasadog’s nose.ThemaintaskofAuburnUniversity’sInstituteforBiologicalDetectionSystemsistofindchemicalthatcanaltertheelectricalcurrentpassingthrough.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
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{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
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{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
{{*HTML*}}阅读下面这篇短文短文后有2项测试任务1第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ??Everyyearthousandsofgreywhalesmakethelongest migrationofanyanimaltraveling7000mileseachwaybetweentheArcticand BajaCalifornia.ThegreywhalesspendthelongsummerdaysintheirArctic feedinggroundsintheBeringSeabetweenAlaskaandRussia.Unlikeafishthe whaleiswarm-bloodedandmustthereforemaintainarelativelyhighinternal bodytemperature.InthecoldArcticwatersthegreywhaleisprotectedbyan outerlayerofblubberwhichaveragessixinchesinthickness.Otherwhalessuch astheGreenlandNightwhalehavebeenfoundwithatwo-footthicklayerof blubbercoveringtheirbodies.2.??Duringthesesummermonths intheArcticthegreywhalesfattenthemselvesbyconsumingenormousquantities ofsmallshrimp-likeanimalscalledamphipods.Recentobservationsofayoung greywhaleGigiⅡheldincaptivityatSeaWorldinSanDiegoduring1971and 1972suggestthatthegreywhalefeedsbysweepingitsenormousheadoverthe bottom.Theamphipodsonwhichitfeedsareeitherstirredoffthebottomor leapoffthebottomtoescape.Theseanimalsandthesurroundingwaterare suckedintothewhale’smouth.Asthewaterisexpelledfromthemouthit passesthroughcoarsebaleenfibres.Thesmallanimalsaretrappedand swallowed.3.??InOctoberasthedaysgetshorterandicebegins toformovertheArcticfeedinggroundstheCaliforniagreywhalebeginsits longjourneysouthtothewarmwatersofBajaCalifornia.Duringthis three-monthlongtripthewhalestravellingingroupsstayclosetotheshoreof NorthAmericaswimmingbothdayandnightandaveragingabut100milesper day.4??Duringthetripsouththegreywhalesthataresexually matureatleastthreeyearsoldandnotpregnantalreadyformmatinggroups. Thesegroupsarecomposedofthreewhalestwomalesandafemale.Thedominant malecoupleswiththefemalewhilethesecondmaleiskeptbusypositioningthe twowhalesontheirsidesfacingeachotherandkeepingthemtogetherduringthe sexact.Thisisnosmalljobsinceeachwhalecanbefiftyfeetlongandweigh fortytons.5.??DuringDecemberandJanuarythegreywhales arriveatthewarmlagoonsalongthecoastofBajaCalifornia.Thewhalesswim milesinlandalongnarrowshallowchannels.Thesechannelsarethebreeding groundsoftheCaliforniagreywhale.Thecalfhasbeengestatinginthe pregnantfemaleforthelastthirteenmonthsthatissinceherlastjourney south.Theexpectantcowisaidedinthebirthofthecalfbyanotherfemale thatactsasamidwife.Atbirththecalfsinkstowardtheseafloor.Beinga mammalthewhalemustbreatheatthesurface.Themidwifeguidesthebabywhale tothesurfaceforitsfirstgulpofair.Thecalfthenfindsitsmother’s nipplesandrichwhalemilkisforcedintoitsmouth.Duringthenexttwomonths thecalfwillgrowtwentyfeetanddoubleitsweight.6.??In MarchthewhalesbegintheirlongjourneynorthtotheArctic.The newly-pregnantfemalesleavefirstfollowingbythemalesandimmaturefemales. ThelasttoleavethewarmwatersofBajaarethefemalesandtheircalves.The whalesarriveattheirArcticfeedinggroundinJune.Manyscientistsbelieve thatduringthisentireeightmonthlong14000milejourneytheCalifornia greywhaledoesnotfeedatall!Paragraph5______
{{*HTML*}}{{B}}第二篇{{/B}} ??Geologistshavebeenstudyingvolcanoes foralongtime.Thoughtheyhavelearnedagreatdealtheystillhavenot discoveredthecauseofvolcanicaction.Theyknowthattheinsideoftheearth isveryhotbuttheyarenotsureexactlywhatcausesthegreatheat.Some geologistshavethoughtthattheheatiscausedbythegreatpressureofthe earth’souterlayers.Ortheheatmaybeleftfromthetimewhentheearthwas formed.Duringthelastsixtyyearsscientistshavelearnedaboutradium uraniumthoriumandotherradioactiveelements.Thesegiveoutheatallthe timeastheychangeintootherelements.Manyscientistsnowbelievethatmuch oftheheatinsidetheearthisproducedbyradioactiveelements.? ?Whateverthecauseoftheheatmaybewedoknowthattheearthgets hotterthefartherdownwedig.Indeepminesandoilwellsthetemperature risesabout1Fforeach50feet.Atthisratethetemperature40milesbelow theearth’ssurfacewouldbeover4000FThisismuchhotterthannecessary tomeltrock.Howeverthepressureoftherockabovekeepsmostmaterialsfrom meltingattheirusualmeltingpoints.Geologistsbelievethattherockdeepin theearthmaybeplasticorputtylike.Inotherwordstherockyieldsslowly topressurebutisnotliquid.Butifsomechangeintheearth’scrustreleases thepressuretherockmelts.Thenthehotliquidrockcanmoveuptowardthe surface.??Whenthemeltedrockworksitswayclosetoearth’s crustavolcanomaybeformed.Themeltedrockoftencontainssteamandother gasesundergreatpressure.Iftherockabovegiveswaythepressureis released.Thenthesuddenexpansionofthegasescausesexplosions.Thesesblow themeltedrockintopiecesofdifferentsizesandshootthemhighintheair. Heretheycoolandhardenintovolcanicashandcinders.Someofthematerial fallsaroundtheholemadeintheearth’ssurface.Themeltedrockmaykeepon risingandpouroutaslava.Inthiswayvolcanicashcindersandlavabuild upthecone-shapedmountainsthatwecall volcanoes.Thecausefortheheatintheinterioroftheearthis______.
Iknowthisisfrustratingbutpleasetrynotto{{U}}loseyourtemper{{/U}}.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ??????{{B}}InternationalTrade{{/B}}? ?SincetheendofWorldWarIIinternationaltradehasdeveloped dramatically.Allcountriesinthemodernworldjoininworldwidetradethrough whichvarioussortsofmerchandiseand{{U}}?51?{{/U}}materialsarc exportedin{{U}}?52?{{/U}}forforeigncurrencywhichmeansincome wealthfrom{{U}}?53?{{/U}}andjobopportunityathomeandinthe meantimeforeigngoodsareimportedtoprovideconsumerswith{{U}}?54 ?{{/U}}andwelcomemerchandise.Todayeconomicinterdependenceamong countriesisso{{U}}?55?{{/U}}thatnocountrycancloseitsdoorsto theoutsideworldandthemoreprosperousthenationaleconomythemore developedtheforeigntrade.Economicglobalizationisnowa{{U}}?56 ?{{/U}}intheworld.??Butinthepastwhenoldandnew colonialismruledtheworldtherewasnofreeandfairtradeatall.Powers {{U}}?57?{{/U}}theBritishempiretheUnitedStatesRussiaJapan dividedtheworldintotheirspheresofinfluence—theircoloniesor dependencieswheretheirbusinessmen{{U}}?58?{{/U}}theirmerchandise athighpricesandbought{{U}}?59?{{/U}}rawmaterialsandlaborat lowprices.{{U}}?60?{{/U}}ofwealthflowedtothesepowerswhichthen grewprosperous{{U}}?61?{{/U}}thecoloniesweredriveninto destitution贫困.Thenationaleconomyofcolonieswasinnatelydefective.Their industriescouldnotsurvivetheoverwhelming{{U}}?62?{{/U}}of importsfromthepowers.Theirmonotonousnationaleconomy{{U}}?63 ?{{/U}}inproductionofoneortwoagriculturalcropsor{{U}}?64 ?{{/U}}productsormineralstobesoldininternationalmarketfor exampleorangeandsugarcaneinCubabananaandcoffeeinSouth-Americacoal inPolandall{{U}}?65?{{/U}}tosupply-demandrelationinworld marketundercontrolofthepowers.Eventheircustomsweregovernedby officialsfromthepowerswhoseexportedgoodsthuscouldenterthecolonies nearlyduty-free.Itwasafterthecollapseofcolonialistsystemalloverthe worldthatfreeandfairinternationaltradeatleasttheoreticallycouldbe possible.
ThevolcaniceruptionofMountPinatuboin1991blewa{{U}}gigantic{{/U}}amountofsulfatesintothestratosphere.
{{*HTML*}}阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断如果该句提供的是正确信息请选择A如果该句提供的是错误信息请选择B如果该句的信息文章中没有提及请选择C ??There’ssimplepremisebehindwhat LarryMyersdoesforaliving:Ifyoucansmellityoucanfindit.? ?MyersisthefounderofAuburnUniversity’sInstituteforBiological DetectionSystemsthemaintaskofwhichistochasetheultimateindetection devices--anartificialnose.??Fornowthesubjectoftheir researchislittlemorethanastackofgleamingchipstuckedawayina laboratorydrawer.Butsoonsuchatoolcouldbehangingfromthebeltsof policearson纵火investigatorsandfood-safetyinspectors.??The technologythattheyareworkingonwouldsuggestquitereasonablethatwithin threetofiveyearswe’llhavesomeworkablesensorsreadytouse.Suchdevices mightfindwideuseinplacesthatattractterrorists.Policecoulddetect drugsbodiesandbombshiddenincarswhilefoodinspectorscouldeasilytest foodandwaterforcontamination.??Theimplicationsfor revolutionaryadvancesinpublicsafetyandthefoodindustryareastonishing. Butsotooarethepossibilitiesforabuse:Suchmachinescoulddetermine whetherawomanisovulating排卵withoutaphysicalexam--orevenher knowledge??OneofthetraditionalprotectorsofAmericanliberty isthatithasbeenimpossibletosearcheveryone.That’sgettingnottobethe case.??ArtificialbiosensorscreatedatAuburnworktotally differentlyfromanythingeverseenbefore.AromaScanforexampleisadesktop machinebasedonabankofchipssensitivetospecificchemicalsthatevaporate intotheair.Asairissuckedintothemachinechemicalspassoverthesensor surfacesandproducechangesintheelectricalcurrentflowingthroughthem. Thosecurrentchangesareloggedintoacomputerthatsortsourodorsbasedon theirelectricalsignatures.??Myerssaystheyexpecttoloada singlefingernail-sizechipwiththousandsofodorreceptors感受器enoughto createasensorthat’snearlyassensitiveasadog’s nose.Apotentialproblemwhichmightbecausedbytheuseofanartificialnoseisathreattoindividualprivacy.
{{*HTML*}}{{B}}第三篇{{/B}} ??Archaeologyhaslongbeenanaccepted toolforstudyingprehistoriccultures.Relativelyrecentlythesametechniques havebeensystematicallyappliedtostudiesofthemoreimmediatepast.Thishas beencalledhistoricalarchaeologyatermthatisusedintheUnitedStates torefertoanyarchaeologicalinvestigationintoNorthAmericansitesthat postdatethearrivalofEuropeans.??Backinthe1930’sand 1940’swhenbuildingrestorationwaspopularhistoricalarchaeologywas primarilyatoolofarchitecturalreconstruction.Theroleofarchaeologistswas tofindthefoundationsofhistoricbuildingsandthentakeabackseatto architects.??Themaniaforreconstructionhadlargelysubsidedby the1950’sand1960’s.Mostpeopleenteringhistoricalarchaeologyduringthis periodcameoutofuniversityanthropologydepartmentswheretheyhadstudied prehistoriccultures.Theywerebytrainingsocialscientistsnothistorians andtheirworktendedtoreflectthisbias.Thequestionstheyframedandthe techniquestheyusedweredesignedtohelpthemunderstandasscientistshow peoplebehaved.?Butbecausetheyweretreading踩踏onhistoricalground forwhichtherewasoftenextensivewrittendocumentationandbecausetheirown knowledgeoftheseperiodswasusuallylimitedtheircontributionstoAmerican historyremainedcircumscribed.Theirreportshighlytechnicalandsometimes poorlywrittenwentunread.??Morerecentlyprofessional archaeologistshavetakenover.Theseresearchershavesoughttodemonstrate thattheirworkcanbeavaluabletoolnotonlyofsciencebutalsoofhistory providingfreshinsightsintothedailylivesofordinarypeoplewhose existencesmightntotherwisebesowelldocumented.Thisneweremphasison archaeologyassocialhistoryhasshowngreatpromiseandindeedworkdonein thisareahasledtoareinterpretationoftheUnitedStates’past.? ?InKingstonNewYorkforexampleevidencehasbeenuncoveredthat indicatesthatEnglishgoodswerebeingsmuggledintothatcityatatimewhen theDutchsupposedlycontrolledtradinginthearea.AndinSacramentoan excavationatthesiteofafashionablenineteenth-century?hotelrevealed thatgarbagehadbeenstashed存放inthebuilding’sbasementdespitesanitation lawstothecontrary.Theequivalentofthewordsupposedlyinthelastparagraphis______.
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