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{{B}}第二篇{{/B}} ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? {{B}}Explorer of the Extreme Dee...
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Formanyyearsmyuncleranavery{{U}}successful{{/U}}engineeringbusiness.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*HTML*}}{{B}}第二篇{{/B}} ??Aprofoundchangeseemstohavetaken placeintheeconomicrelationshipbetweenAmericansandtheiranimals.In1993 thepetbusinesswasa$16billionfielddominatedbymomandpopoutfitsand independentveterinarians.Todayitisa$23billionempire.? ?Nearly60percentofAmericanslivewithoneormoreanimals.Morethan30 millionhavedogsand27millionhavecats.Whiletheoverallnumberofowners hasremainedrelativelystablesincethe1980stheyarespendingevergreater amountsontheiranimals.Signsoftheboomareeverywhere.Ontheretailside superstorechainsarecoveringthecountry.??Americansconsider catsanddogsapartofthefamilyratherthanproperty?whichlegally atleasttheyremain.Beingpropertythemselvesforinstanceanimalscannot legallyinheritpropertyinwillsthoughgrowingnumbersofthemarebeing providedforinestatesandsomelawfirmshavedevelopedaspecialtyinthe area.??Thereasonsforthismetamorphosisfrompropertyto personaremysterious.NooneseemstoknowexactlywhyAmericanshavechanged theirviews.Adeclineinwarmthamonghomosapiensmayexplainpartofthe phenomenonsaysattorneyLaneGabeler.Shesaysitactuallyhelpsthepractice bygivingherpeopleasofteredge.Peoplehatelawyersandwelookmorehuman withadogGabelerinsists.??Ontheotherhandtherearemore reasonsnowtoownpetsthantherewereagenerationago.Adultsintheir20s and30smarryandhavekidslaterleavingmoreroomintheirlivestoadopta beast.Medicalresearchhasdeterminedthatcontactwithpetscanlowerblood pressureandfendoffheartattackssomoreandmoreoftheelderlyhave embracedtheanimalkingdom.??Thepetindustryisconfidentthat thefutureremainsbright.Onthehealthinsurancesidealoneforexamplethe markethashardlybeenscratched.IntheUnitedKingdom13percentofthe country’s15millionownershavepoliciesandinSweden57percentof7 millionhavebeeninsured.ButintheUnitedStateswithatotalof114million petsfewerthan1percentofpetsarecoverediftheychokeonachickenbone ortrytobitetheUPStruckdriver.Soifthebondbetweenpeopleandtheir creaturestrulyexistsandifthatbondkeepsdeepeningeconomicallyaswellas emotionallythenextwaveofAmericanmogulsmaywellbepetinsuranceagents rather?thanInternetpioneers.Paragraphs4and5mainlyanswerwhichofthefollowingquestions?
{{*HTML*}}{{B}}第二篇{{/B}} ??Aprofoundchangeseemstohavetaken placeintheeconomicrelationshipbetweenAmericansandtheiranimals.In1993 thepetbusinesswasa$16billionfielddominatedbymomandpopoutfitsand independentveterinarians.Todayitisa$23billionempire.? ?Nearly60percentofAmericanslivewithoneormoreanimals.Morethan30 millionhavedogsand27millionhavecats.Whiletheoverallnumberofowners hasremainedrelativelystablesincethe1980stheyarespendingevergreater amountsontheiranimals.Signsoftheboomareeverywhere.Ontheretailside superstorechainsarecoveringthecountry.??Americansconsider catsanddogsapartofthefamilyratherthanproperty?whichlegally atleasttheyremain.Beingpropertythemselvesforinstanceanimalscannot legallyinheritpropertyinwillsthoughgrowingnumbersofthemarebeing providedforinestatesandsomelawfirmshavedevelopedaspecialtyinthe area.??Thereasonsforthismetamorphosisfrompropertyto personaremysterious.NooneseemstoknowexactlywhyAmericanshavechanged theirviews.Adeclineinwarmthamonghomosapiensmayexplainpartofthe phenomenonsaysattorneyLaneGabeler.Shesaysitactuallyhelpsthepractice bygivingherpeopleasofteredge.Peoplehatelawyersandwelookmorehuman withadogGabelerinsists.??Ontheotherhandtherearemore reasonsnowtoownpetsthantherewereagenerationago.Adultsintheir20s and30smarryandhavekidslaterleavingmoreroomintheirlivestoadopta beast.Medicalresearchhasdeterminedthatcontactwithpetscanlowerblood pressureandfendoffheartattackssomoreandmoreoftheelderlyhave embracedtheanimalkingdom.??Thepetindustryisconfidentthat thefutureremainsbright.Onthehealthinsurancesidealoneforexamplethe markethashardlybeenscratched.IntheUnitedKingdom13percentofthe country’s15millionownershavepoliciesandinSweden57percentof7 millionhavebeeninsured.ButintheUnitedStateswithatotalof114million petsfewerthan1percentofpetsarecoverediftheychokeonachickenbone ortrytobitetheUPStruckdriver.Soifthebondbetweenpeopleandtheir creaturestrulyexistsandifthatbondkeepsdeepeningeconomicallyaswellas emotionallythenextwaveofAmericanmogulsmaywellbepetinsuranceagents rather?thanInternetpioneers.Thepassagesupportswhichofthefollowingstatements?
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*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 ??Anewdrugshowshopeofconqueringaformofleukemiaby targetingthemisbehavingcellstwosummersagoDouglasJensonwassowipedout frombattlingchronicmyelogenous骨髓性的leukemia白血病CMLthathecoulddo littlemorethansitbyhiswindow;watchingthenumbersonathermometerrise andfallwiththesun.TodaythankstoanexperimentaldrugcalledSTI571brand name:GlivecJenson67isbikinginOregonandplanningatriptothe Caribbean.Ifeelwonderfulhesays.2.??Sodohisdoctors. STI571asmartbombdrugthattargetsleukemiacellswithoutharminghealthy ionsfirstmadeheadlineslastyearwhenresearchersannouncedthatwhiteblood countshadreturnedtonormalin31outof31patientswhohadtakenthepill. Lastweekscientistswerehackreportingnewdataonjustover1000patients.In onetrialmorethan90%of532peopleonthedrugsawcountsreturntonormal. Andundermicroscopicexamination28percentshowednoevidenceofcancerleft intheirbonemarrow.3.??Thedrugevenhelpedalthoughnotas dramaticallysomepatientsinthefinalblastphaseofthediseasewhen survivalismeasuredinmonths.STI571hasignitedthecancer-researchfield saysDrBrianDrukeranOreganHealthSciencesUniversityresearcherwho developed?thedrugwithmanufacturerNovartis.4.??CML diagnosedin5100Americanseveryyearistriggeredwhentwochromosomesswap fragmentsofgeneticinformation.CMLstartswiththemistakenswapofgenes betweentwochromosomes.TheresultingPhiladelphiachromosomeproducesthe mutantBcr-Ablprotein.?Bcr-Abltransfersaphosphatefromthechemical messengerATPtootherproteins.Theyinitiateaflawedsignaltowhiteblood cellstoreplicateincessantly.5.??STI571returnsbloodcounts backtonormalforthosepatientswithchronicmyelogenousleukemiaCMLina smartbombwaybytargetingtheproteinthatsendsthemessagetomakethe whitebloodcells.Bonemarrowtransplantscanworkextremelywellbutthey’re applicable?onlyforaminorityofpatients;otherwisestandardtreatment istheinjectabledruginterferon.?Manypatientshowevercannottolerate theadverseeffectswhichincludeseverefatigueweightlossanddepression. Thenewpillworksbydeactivatingthecancercells’growthsignal.Side effects-nauseaeyepuffinessmuscleacheshavebeenrelativelymildso far.Paragraph3.______
Aftertheaccidentmyback{{U}}wasverypainful{{/U}}foralongtime.
{{*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}} ??Unlesswespendmoneytospotand preventasteroids小行星nowonemightcrashintoEarthanddestroylifeaswe knowitsaysomescientists.??Asteroidsarebiggerversionsof themeteoroids流星thatreaceacrossthenightsky.Mostorbitthesunfarfrom Earthanddon’tthreatenus.Buttherearealsothousandsofasteroidswhose orbitsputthemonacollisioncoursewithEarth.??Buy$50 millionworthofnowtelescopesrightnow.Thenspend$10millionayearfor thenext25yearstolocatemostofthespacerocks.Bythetimewespotafatal onethescientistssaywe’llhaveawaytochangeitscourse.? ?Somescientistsfavorpushingasteroidsoffcoursewithnuclearweapons. Butthecostwouldn’tbecheap.??Isitworthit?Twothings expertsconsiderwhenjudginganyriskare:1Howlikelytheeventis;and2 Howbadtheconsequencesiftheeventoccurs.Expertsthinkanasteroidbig enoughtodestroylotsoflifemightstrikeEarthonceevery500000years. Soundsprettyrare—butifonedidfallitwouldbetheendoftheworld.If wedon’ttakecareofthesebigasteroidsthey’lltakecareofussaysone scientist.It’sthatsimple.??Thecurethoughmightbeworse thanthedisease.Dowereallywantfleetsofnuclearweaponssittingaroundon Earth?Theworldhaslesstofearfromdoomsday毁灭性rocksthanfromagreat nuclearfleetsetagainstthemsaidaNewYorkTimes article.Whatdoesthepassagesayaboutasteroidsandmeteoroids?
{{*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 ??Anewdrugshowshopeofconqueringaformofleukemiaby targetingthemisbehavingcellstwosummersagoDouglasJensonwassowipedout frombattlingchronicmyelogenous骨髓性的leukemia白血病CMLthathecoulddo littlemorethansitbyhiswindow;watchingthenumbersonathermometerrise andfallwiththesun.TodaythankstoanexperimentaldrugcalledSTI571brand name:GlivecJenson67isbikinginOregonandplanningatriptothe Caribbean.Ifeelwonderfulhesays.2.??Sodohisdoctors. STI571asmartbombdrugthattargetsleukemiacellswithoutharminghealthy ionsfirstmadeheadlineslastyearwhenresearchersannouncedthatwhiteblood countshadreturnedtonormalin31outof31patientswhohadtakenthepill. Lastweekscientistswerehackreportingnewdataonjustover1000patients.In onetrialmorethan90%of532peopleonthedrugsawcountsreturntonormal. Andundermicroscopicexamination28percentshowednoevidenceofcancerleft intheirbonemarrow.3.??Thedrugevenhelpedalthoughnotas dramaticallysomepatientsinthefinalblastphaseofthediseasewhen survivalismeasuredinmonths.STI571hasignitedthecancer-researchfield saysDrBrianDrukeranOreganHealthSciencesUniversityresearcherwho developed?thedrugwithmanufacturerNovartis.4.??CML diagnosedin5100Americanseveryyearistriggeredwhentwochromosomesswap fragmentsofgeneticinformation.CMLstartswiththemistakenswapofgenes betweentwochromosomes.TheresultingPhiladelphiachromosomeproducesthe mutantBcr-Ablprotein.?Bcr-Abltransfersaphosphatefromthechemical messengerATPtootherproteins.Theyinitiateaflawedsignaltowhiteblood cellstoreplicateincessantly.5.??STI571returnsbloodcounts backtonormalforthosepatientswithchronicmyelogenousleukemiaCMLina smartbombwaybytargetingtheproteinthatsendsthemessagetomakethe whitebloodcells.Bonemarrowtransplantscanworkextremelywellbutthey’re applicable?onlyforaminorityofpatients;otherwisestandardtreatment istheinjectabledruginterferon.?Manypatientshowevercannottolerate theadverseeffectswhichincludeseverefatigueweightlossanddepression. Thenewpillworksbydeactivatingthecancercells’growthsignal.Side effects-nauseaeyepuffinessmuscleacheshavebeenrelativelymildso far.Paragraph5.______
{{*HTML*}}阅读下面的短文文章中有5处空白文章后有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ??Thatapersoncouldliveinthemodernworldwithout syntheticsubstancesisprobablypossiblebutwhoevertriedtodoitwouldsoon missmanycommonthings.{{U}}?46?{{/U}}Justimaginehowmany varietiesofplasticsthereare.Theycanbeharderthanwoodor.softerthan rubber.Theycanevenbemaderesistanttofirewaterand electricity.??Whoevervisitstheworld’smarketplaceswillfind thatplasticsarebeingmadeandusedeverywhere.Plasticarticlescanbe producedataratherlowcost.Themachinesformoldingthemarenotlargeor heavy.Mostoftheproductscanbestoredandtransportedeasily.{{U}}?47 ?{{/U}}.??Asamatteroffactmanykindsofmaterialsfor clothinghaveplasticsinthem.Theyaremadeofplasticfibresandareknownby specialnamessuchasnylonordacron.Clothingmadeofplasticfibreshas certainadvantagesoverthatofnaturalfibreslikecottonwoolorsilk.{{U}} ?48?{{/U}}.??{{U}}?49?{{/U}}Theearliest varietyofplasticswascalledcelluloid.Itappearedonmarketoverahundred yearsago.In1912anAmericanscientistpresentedtotheworldahardplastic materialknownasbakelite.The1940’ssawafasterdevelopmentofplastics. Anevenlargervarietyofplasticmaterialscameintopracticaluse.Now plasticsfindwideapplicationnotonlyinourdailylifebutalsoin engineering.TheGermanshavemanufacturedacarwhichisalmostcompletelymade ofplastics.ThefamousBritishenginebuildershaveproducedanaeroplane ?enginemademostlyofplastics.??Itisreallytruethat plasticsareforeveryone.Andthefactthatthetotalvolumeofplasticsinuse isontheincreasesuggeststhatmoreandbetterplasticswillbemadeinthe nearfuture.{{U}}?50?{{/U}}.??A.Besidesplasticpens combsandtoothbrusheshewouldbewithoutmanykindsofclothaswellassome necessarypartsforradiosandtelevisionsets.??B.Thehistory ofplasticsislongerthanyoumightexpect.??C.That’swhy factoriesformakingthemcanbefoundinmanycountries.??D. Theformerislighterinweighteasiertowashanddrykeepsinshapemuch longeranddoesnotwearoutsoquickly.??E.Itisnotlikely thatplasticfiberswillcompelelytaketheplaceofnaturalfibers.? ?F.PerhapswecouldcallitthePlasticAge.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
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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 ??ThetemperatureoftheSunisover 5000degreesFahrenheitatthesurfacebutitrisestoperhapsmorethan16 milliondegreesatthecenter.TheSunissomuchhotterthantheEarththat mattercanexistonlyasagasexceptatthecore.InthecoreoftheSunthe pressuresaresogreatagainstthegasesthatdespitethehightemperature theremaybeasmallsolidcore.Howevernoonereallyknowssincethecenter oftheSuncanneverbedirectlyobserved.Solarastronomersdoknowthatthe Sunisdividedintofivelayersorzones.Startingattheoutsideandgoingdown intotheSunthezonesarethecoronachromospherephotosphereconvection zonesandfinallythecore.ThefirstthreezonesareregardedastheSun’s atmosphere.ButsincetheSunhasnosolidsurfaceitishardtotellwherethe atmosphereendsandthemainbodyoftheSunbegins.TheSun’soutermostlayer beginsabout10000milesabovethevisiblesurfaceandgoesoutwardfor millionsofmiles.ThisistheonlypartoftheSunthatcanbeseenduringan eclipsesuchastheoneinFebruary1979.Atanyothertimethecoronacanbe seenonlywhenspecialinstrumentsareusedoncamerasandtelescopestoshut outtheglareoftheSun’srays.Thecoronainbrilliantpearlywhitefilmy lightaboutasbrightasthefullMoon.Itsbeautifulraysareasensational sightduringaneclipse.Thecorona’sraysflashoutinabrilliantfanthat haswispyspike-likeraysneartheSun’snorthandsouthpoles.Thecoronais thickestattheSun’sequator.Thecoronaraysaremadeupofgasesstreaming outwardattremendousspeedsandreachingatemperatureofmorethan2million degreeFahrenheit.Theraysofgasthinoutastheyreachthespacearoundthe planets.BythetimetheSun’scoronaraysreachtheEarththeyareweakand invisible.TheremustbeasolidcoreinthecoreoftheSun.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*HTML*}}{{B}}第三篇{{/B}} ??Inthe1950sthepioneersof artificialintelligenceAIpredictedthatbytheendofthiscentury computerswouldbeconversingwithusatworkandrobotswouldbeperformingour housework.Butasusefulascomputersarethey’renowhereclosetoachieving anythingremotely?resemblingtheseearlyaspirationsforhumanlike behavior.Nevermindsomethingascomplexasconversation:themostpowerful computersstruggletoreliablyrecognizetheshapeofanobjectthemost elementaryoftasksforatenmonth-oldkid.??Agrowinggroupof AIresearchersthinktheyknowwherethefieldwentwrong.Theproblemthe scientistssayisthatAIhasbeentryingtoseparatethehighestmost abstractlevelsofthoughtlikelanguageandmathematicsandtoduplicatethem withlogicalstep-by-stepprograms.AnewmovementinAIontheotherhand takesacloserlookatthemoreroundaboutwayinwhichnaturecameupwith intelligence.Manyoftheseresearchersstudyevolutionandnaturaladaptation insteadofformallogicandconventionalcomputerprograms.Ratherthandigital computersandtransistorssomewanttoworkwithbraincellsandproteins. ?Theresultsoftheseearlyeffortsareaspromisingastheyarepeculiar andthenewnature-basedAImovementisslowlybutsurelymovingtothe forefrontofthefield.??Imitatingthebrain’sneural神经 networkisahugestepintherightdirectionsayscomputerscientistand biophysicistMichaelConradbutisstillmissesanimportantaspectofnatural intelligence.Peopletendtotreatthebrainasifitweremadeupof color-codedtransistorsheexplainsbutit’snotsimplyaclevernetworkof switches.Therearelotsofimportantthingsgoingoninsidethebraincells themselves.SpecificallyConradbelievesthatmanyofthebrain’scapabilities stemfromthepattern-recognitionproficiencyoftheindividualmoleculesthat makeupeachbraincell.Thebestwaytobuildanartificiallyintelligent deviceheclaimswouldbetobuilditaroundthesamesortofmolecular skills.??Rightnowthenotionthatconventionalcomputersand softwarearefundamentallyincapableofmatchingtheprocessesthattakeplace inthebrainremainscontroversial.Butifitprovestruethentheeffortsof ConradandhisfellowA1rebelscouldturnouttobetheonlygamein town.ConradandhisgroupofAIresearchershavebeenmakingenormouseffortsto______.
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{{*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 ??Anewdrugshowshopeofconqueringaformofleukemiaby targetingthemisbehavingcellstwosummersagoDouglasJensonwassowipedout frombattlingchronicmyelogenous骨髓性的leukemia白血病CMLthathecoulddo littlemorethansitbyhiswindow;watchingthenumbersonathermometerrise andfallwiththesun.TodaythankstoanexperimentaldrugcalledSTI571brand name:GlivecJenson67isbikinginOregonandplanningatriptothe Caribbean.Ifeelwonderfulhesays.2.??Sodohisdoctors. STI571asmartbombdrugthattargetsleukemiacellswithoutharminghealthy ionsfirstmadeheadlineslastyearwhenresearchersannouncedthatwhiteblood countshadreturnedtonormalin31outof31patientswhohadtakenthepill. Lastweekscientistswerehackreportingnewdataonjustover1000patients.In onetrialmorethan90%of532peopleonthedrugsawcountsreturntonormal. Andundermicroscopicexamination28percentshowednoevidenceofcancerleft intheirbonemarrow.3.??Thedrugevenhelpedalthoughnotas dramaticallysomepatientsinthefinalblastphaseofthediseasewhen survivalismeasuredinmonths.STI571hasignitedthecancer-researchfield saysDrBrianDrukeranOreganHealthSciencesUniversityresearcherwho developed?thedrugwithmanufacturerNovartis.4.??CML diagnosedin5100Americanseveryyearistriggeredwhentwochromosomesswap fragmentsofgeneticinformation.CMLstartswiththemistakenswapofgenes betweentwochromosomes.TheresultingPhiladelphiachromosomeproducesthe mutantBcr-Ablprotein.?Bcr-Abltransfersaphosphatefromthechemical messengerATPtootherproteins.Theyinitiateaflawedsignaltowhiteblood cellstoreplicateincessantly.5.??STI571returnsbloodcounts backtonormalforthosepatientswithchronicmyelogenousleukemiaCMLina smartbombwaybytargetingtheproteinthatsendsthemessagetomakethe whitebloodcells.Bonemarrowtransplantscanworkextremelywellbutthey’re applicable?onlyforaminorityofpatients;otherwisestandardtreatment istheinjectabledruginterferon.?Manypatientshowevercannottolerate theadverseeffectswhichincludeseverefatigueweightlossanddepression. Thenewpillworksbydeactivatingthecancercells’growthsignal.Side effects-nauseaeyepuffinessmuscleacheshavebeenrelativelymildso far.Thedrugwillprobablybeapproved_______.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*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}} ??Unlesswespendmoneytospotand preventasteroids小行星nowonemightcrashintoEarthanddestroylifeaswe knowitsaysomescientists.??Asteroidsarebiggerversionsof themeteoroids流星thatreaceacrossthenightsky.Mostorbitthesunfarfrom Earthanddon’tthreatenus.Buttherearealsothousandsofasteroidswhose orbitsputthemonacollisioncoursewithEarth.??Buy$50 millionworthofnowtelescopesrightnow.Thenspend$10millionayearfor thenext25yearstolocatemostofthespacerocks.Bythetimewespotafatal onethescientistssaywe’llhaveawaytochangeitscourse.? ?Somescientistsfavorpushingasteroidsoffcoursewithnuclearweapons. Butthecostwouldn’tbecheap.??Isitworthit?Twothings expertsconsiderwhenjudginganyriskare:1Howlikelytheeventis;and2 Howbadtheconsequencesiftheeventoccurs.Expertsthinkanasteroidbig enoughtodestroylotsoflifemightstrikeEarthonceevery500000years. Soundsprettyrare—butifonedidfallitwouldbetheendoftheworld.If wedon’ttakecareofthesebigasteroidsthey’lltakecareofussaysone scientist.It’sthatsimple.??Thecurethoughmightbeworse thanthedisease.Dowereallywantfleetsofnuclearweaponssittingaroundon Earth?Theworldhaslesstofearfromdoomsday毁灭性rocksthanfromagreat nuclearfleetsetagainstthemsaidaNewYorkTimes article.Whichofthefollowingbestdescribestheauthor’stoneinthispassage?
{{*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 ??Anewdrugshowshopeofconqueringaformofleukemiaby targetingthemisbehavingcellstwosummersagoDouglasJensonwassowipedout frombattlingchronicmyelogenous骨髓性的leukemia白血病CMLthathecoulddo littlemorethansitbyhiswindow;watchingthenumbersonathermometerrise andfallwiththesun.TodaythankstoanexperimentaldrugcalledSTI571brand name:GlivecJenson67isbikinginOregonandplanningatriptothe Caribbean.Ifeelwonderfulhesays.2.??Sodohisdoctors. STI571asmartbombdrugthattargetsleukemiacellswithoutharminghealthy ionsfirstmadeheadlineslastyearwhenresearchersannouncedthatwhiteblood countshadreturnedtonormalin31outof31patientswhohadtakenthepill. Lastweekscientistswerehackreportingnewdataonjustover1000patients.In onetrialmorethan90%of532peopleonthedrugsawcountsreturntonormal. Andundermicroscopicexamination28percentshowednoevidenceofcancerleft intheirbonemarrow.3.??Thedrugevenhelpedalthoughnotas dramaticallysomepatientsinthefinalblastphaseofthediseasewhen survivalismeasuredinmonths.STI571hasignitedthecancer-researchfield saysDrBrianDrukeranOreganHealthSciencesUniversityresearcherwho developed?thedrugwithmanufacturerNovartis.4.??CML diagnosedin5100Americanseveryyearistriggeredwhentwochromosomesswap fragmentsofgeneticinformation.CMLstartswiththemistakenswapofgenes betweentwochromosomes.TheresultingPhiladelphiachromosomeproducesthe mutantBcr-Ablprotein.?Bcr-Abltransfersaphosphatefromthechemical messengerATPtootherproteins.Theyinitiateaflawedsignaltowhiteblood cellstoreplicateincessantly.5.??STI571returnsbloodcounts backtonormalforthosepatientswithchronicmyelogenousleukemiaCMLina smartbombwaybytargetingtheproteinthatsendsthemessagetomakethe whitebloodcells.Bonemarrowtransplantscanworkextremelywellbutthey’re applicable?onlyforaminorityofpatients;otherwisestandardtreatment istheinjectabledruginterferon.?Manypatientshowevercannottolerate theadverseeffectswhichincludeseverefatigueweightlossanddepression. Thenewpillworksbydeactivatingthecancercells’growthsignal.Side effects-nauseaeyepuffinessmuscleacheshavebeenrelativelymildso far.Theevidenceisstrong90%successrate______.
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{{*HTML*}}{{B}}第三篇{{/B}} ??Inthe1950sthepioneersof artificialintelligenceAIpredictedthatbytheendofthiscentury computerswouldbeconversingwithusatworkandrobotswouldbeperformingour housework.Butasusefulascomputersarethey’renowhereclosetoachieving anythingremotely?resemblingtheseearlyaspirationsforhumanlike behavior.Nevermindsomethingascomplexasconversation:themostpowerful computersstruggletoreliablyrecognizetheshapeofanobjectthemost elementaryoftasksforatenmonth-oldkid.??Agrowinggroupof AIresearchersthinktheyknowwherethefieldwentwrong.Theproblemthe scientistssayisthatAIhasbeentryingtoseparatethehighestmost abstractlevelsofthoughtlikelanguageandmathematicsandtoduplicatethem withlogicalstep-by-stepprograms.AnewmovementinAIontheotherhand takesacloserlookatthemoreroundaboutwayinwhichnaturecameupwith intelligence.Manyoftheseresearchersstudyevolutionandnaturaladaptation insteadofformallogicandconventionalcomputerprograms.Ratherthandigital computersandtransistorssomewanttoworkwithbraincellsandproteins. ?Theresultsoftheseearlyeffortsareaspromisingastheyarepeculiar andthenewnature-basedAImovementisslowlybutsurelymovingtothe forefrontofthefield.??Imitatingthebrain’sneural神经 networkisahugestepintherightdirectionsayscomputerscientistand biophysicistMichaelConradbutisstillmissesanimportantaspectofnatural intelligence.Peopletendtotreatthebrainasifitweremadeupof color-codedtransistorsheexplainsbutit’snotsimplyaclevernetworkof switches.Therearelotsofimportantthingsgoingoninsidethebraincells themselves.SpecificallyConradbelievesthatmanyofthebrain’scapabilities stemfromthepattern-recognitionproficiencyoftheindividualmoleculesthat makeupeachbraincell.Thebestwaytobuildanartificiallyintelligent deviceheclaimswouldbetobuilditaroundthesamesortofmolecular skills.??Rightnowthenotionthatconventionalcomputersand softwarearefundamentallyincapableofmatchingtheprocessesthattakeplace inthebrainremainscontroversial.Butifitprovestruethentheeffortsof ConradandhisfellowA1rebelscouldturnouttobetheonlygamein town.Theauthorsaysthatthepowerfulcomputersoftoday______.
{{*HTML*}}阅读下面的短文文章中有5处空白文章后有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ??Thatapersoncouldliveinthemodernworldwithout syntheticsubstancesisprobablypossiblebutwhoevertriedtodoitwouldsoon missmanycommonthings.{{U}}?46?{{/U}}Justimaginehowmany varietiesofplasticsthereare.Theycanbeharderthanwoodor.softerthan rubber.Theycanevenbemaderesistanttofirewaterand electricity.??Whoevervisitstheworld’smarketplaceswillfind thatplasticsarebeingmadeandusedeverywhere.Plasticarticlescanbe producedataratherlowcost.Themachinesformoldingthemarenotlargeor heavy.Mostoftheproductscanbestoredandtransportedeasily.{{U}}?47 ?{{/U}}.??Asamatteroffactmanykindsofmaterialsfor clothinghaveplasticsinthem.Theyaremadeofplasticfibresandareknownby specialnamessuchasnylonordacron.Clothingmadeofplasticfibreshas certainadvantagesoverthatofnaturalfibreslikecottonwoolorsilk.{{U}} ?48?{{/U}}.??{{U}}?49?{{/U}}Theearliest varietyofplasticswascalledcelluloid.Itappearedonmarketoverahundred yearsago.In1912anAmericanscientistpresentedtotheworldahardplastic materialknownasbakelite.The1940’ssawafasterdevelopmentofplastics. Anevenlargervarietyofplasticmaterialscameintopracticaluse.Now plasticsfindwideapplicationnotonlyinourdailylifebutalsoin engineering.TheGermanshavemanufacturedacarwhichisalmostcompletelymade ofplastics.ThefamousBritishenginebuildershaveproducedanaeroplane ?enginemademostlyofplastics.??Itisreallytruethat plasticsareforeveryone.Andthefactthatthetotalvolumeofplasticsinuse isontheincreasesuggeststhatmoreandbetterplasticswillbemadeinthe nearfuture.{{U}}?50?{{/U}}.??A.Besidesplasticpens combsandtoothbrusheshewouldbewithoutmanykindsofclothaswellassome necessarypartsforradiosandtelevisionsets.??B.Thehistory ofplasticsislongerthanyoumightexpect.??C.That’swhy factoriesformakingthemcanbefoundinmanycountries.??D. Theformerislighterinweighteasiertowashanddrykeepsinshapemuch longeranddoesnotwearoutsoquickly.??E.Itisnotlikely thatplasticfiberswillcompelelytaketheplaceofnaturalfibers.? ?F.PerhapswecouldcallitthePlasticAge.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出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 ??Plantsstillgiveusouroxygen.If everyplant{{U}}?51?{{/U}}you’lldietoo.Withoutplantsyoucan’t breathe.Butyoualsoneedenergy.Youneedittobreatheandtomove.Infact youneed?{{U}}?52?{{/U}}tolive.??Someofthe firstlivingthingscouldn’t{{U}}?53?{{/U}}theirownenergy.They neededtheenergyofsunlightbuttheycouldn’tmakeitthemselves.{{U}} ?54?{{/U}}couldtheygetit?Therewasonlyoneansweratthe{{U}} ?55?{{/U}}.??Thatisstilltruetoday.Animalsstill havetogettheirenergyfrom.plants.Plantskeepyou{{U}}?56 ?{{/U}}.Sometimesweeattheplants{{U}}?57?{{/U}}.Butsometimes ananimaleatstheplants?58?thenweeattheanimal.? ?Applesandorangesgrowontrees—plants.Breadcomesfromplantsina{{U}} ?59?{{/U}}.Wegeteggsfrombirdsbutthebirdseatplants.Or theyeatinsectsandtheinsectshaveeatenplants.??Wecan eat{{U}}?60?{{/U}}fromadeerbutthedeerhaseatenplants.We eat{{U}}?61?{{/U}}andthefishhasalreadyeatenplants.Oritate otherfish—andtheyateplants.Wedon’teat{{U}}?62?{{/U}}butwe drinkmilk.Andthecowhaseatenthegrassforus.??Everypart ofyourfoodcomesfromplants.Whenyoueatpartofananimalaskyourself whatdidthisanimaleat?Ifitateotheranimalsaskyourselfwhatdidthey eat?Youwillalways{{U}}?63?{{/U}}aplant.??Sowhatis reallykeepingyoualive?Thegreenplantsoftheworldarecatchingsunlight foryou.Youareusingtheenergyfromourown{{U}}?64 ?{{/U}}.??Youare{{U}}?65?{{/U}}the sun.
{{*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 ??ThetemperatureoftheSunisover 5000degreesFahrenheitatthesurfacebutitrisestoperhapsmorethan16 milliondegreesatthecenter.TheSunissomuchhotterthantheEarththat mattercanexistonlyasagasexceptatthecore.InthecoreoftheSunthe pressuresaresogreatagainstthegasesthatdespitethehightemperature theremaybeasmallsolidcore.Howevernoonereallyknowssincethecenter oftheSuncanneverbedirectlyobserved.Solarastronomersdoknowthatthe Sunisdividedintofivelayersorzones.Startingattheoutsideandgoingdown intotheSunthezonesarethecoronachromospherephotosphereconvection zonesandfinallythecore.ThefirstthreezonesareregardedastheSun’s atmosphere.ButsincetheSunhasnosolidsurfaceitishardtotellwherethe atmosphereendsandthemainbodyoftheSunbegins.TheSun’soutermostlayer beginsabout10000milesabovethevisiblesurfaceandgoesoutwardfor millionsofmiles.ThisistheonlypartoftheSunthatcanbeseenduringan eclipsesuchastheoneinFebruary1979.Atanyothertimethecoronacanbe seenonlywhenspecialinstrumentsareusedoncamerasandtelescopestoshut outtheglareoftheSun’srays.Thecoronainbrilliantpearlywhitefilmy lightaboutasbrightasthefullMoon.Itsbeautifulraysareasensational sightduringaneclipse.Thecorona’sraysflashoutinabrilliantfanthat haswispyspike-likeraysneartheSun’snorthandsouthpoles.Thecoronais thickestattheSun’sequator.Thecoronaraysaremadeupofgasesstreaming outwardattremendousspeedsandreachingatemperatureofmorethan2million degreeFahrenheit.Theraysofgasthinoutastheyreachthespacearoundthe planets.BythetimetheSun’scoronaraysreachtheEarththeyareweakand invisible.TheSun’satmosphereonlyexistsinthefirstthreezones.
{{*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}} ??Unlesswespendmoneytospotand preventasteroids小行星nowonemightcrashintoEarthanddestroylifeaswe knowitsaysomescientists.??Asteroidsarebiggerversionsof themeteoroids流星thatreaceacrossthenightsky.Mostorbitthesunfarfrom Earthanddon’tthreatenus.Buttherearealsothousandsofasteroidswhose orbitsputthemonacollisioncoursewithEarth.??Buy$50 millionworthofnowtelescopesrightnow.Thenspend$10millionayearfor thenext25yearstolocatemostofthespacerocks.Bythetimewespotafatal onethescientistssaywe’llhaveawaytochangeitscourse.? ?Somescientistsfavorpushingasteroidsoffcoursewithnuclearweapons. Butthecostwouldn’tbecheap.??Isitworthit?Twothings expertsconsiderwhenjudginganyriskare:1Howlikelytheeventis;and2 Howbadtheconsequencesiftheeventoccurs.Expertsthinkanasteroidbig enoughtodestroylotsoflifemightstrikeEarthonceevery500000years. Soundsprettyrare—butifonedidfallitwouldbetheendoftheworld.If wedon’ttakecareofthesebigasteroidsthey’lltakecareofussaysone scientist.It’sthatsimple.??Thecurethoughmightbeworse thanthedisease.Dowereallywantfleetsofnuclearweaponssittingaroundon Earth?Theworldhaslesstofearfromdoomsday毁灭性rocksthanfromagreat nuclearfleetsetagainstthemsaidaNewYorkTimes article.Whatdopeoplethinkofthesuggestionofusingnuclearweaponstoalterthecourseofasteroids?
{{*HTML*}}{{B}}第三篇{{/B}} ??Inthe1950sthepioneersof artificialintelligenceAIpredictedthatbytheendofthiscentury computerswouldbeconversingwithusatworkandrobotswouldbeperformingour housework.Butasusefulascomputersarethey’renowhereclosetoachieving anythingremotely?resemblingtheseearlyaspirationsforhumanlike behavior.Nevermindsomethingascomplexasconversation:themostpowerful computersstruggletoreliablyrecognizetheshapeofanobjectthemost elementaryoftasksforatenmonth-oldkid.??Agrowinggroupof AIresearchersthinktheyknowwherethefieldwentwrong.Theproblemthe scientistssayisthatAIhasbeentryingtoseparatethehighestmost abstractlevelsofthoughtlikelanguageandmathematicsandtoduplicatethem withlogicalstep-by-stepprograms.AnewmovementinAIontheotherhand takesacloserlookatthemoreroundaboutwayinwhichnaturecameupwith intelligence.Manyoftheseresearchersstudyevolutionandnaturaladaptation insteadofformallogicandconventionalcomputerprograms.Ratherthandigital computersandtransistorssomewanttoworkwithbraincellsandproteins. ?Theresultsoftheseearlyeffortsareaspromisingastheyarepeculiar andthenewnature-basedAImovementisslowlybutsurelymovingtothe forefrontofthefield.??Imitatingthebrain’sneural神经 networkisahugestepintherightdirectionsayscomputerscientistand biophysicistMichaelConradbutisstillmissesanimportantaspectofnatural intelligence.Peopletendtotreatthebrainasifitweremadeupof color-codedtransistorsheexplainsbutit’snotsimplyaclevernetworkof switches.Therearelotsofimportantthingsgoingoninsidethebraincells themselves.SpecificallyConradbelievesthatmanyofthebrain’scapabilities stemfromthepattern-recognitionproficiencyoftheindividualmoleculesthat makeupeachbraincell.Thebestwaytobuildanartificiallyintelligent deviceheclaimswouldbetobuilditaroundthesamesortofmolecular skills.??Rightnowthenotionthatconventionalcomputersand softwarearefundamentallyincapableofmatchingtheprocessesthattakeplace inthebrainremainscontroversial.Butifitprovestruethentheeffortsof ConradandhisfellowA1rebelscouldturnouttobetheonlygamein town.WhichofthefollowingisclosestinmeaningtothephrasetheonlygameintownLine3Para.4?
{{*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 ??ThetemperatureoftheSunisover 5000degreesFahrenheitatthesurfacebutitrisestoperhapsmorethan16 milliondegreesatthecenter.TheSunissomuchhotterthantheEarththat mattercanexistonlyasagasexceptatthecore.InthecoreoftheSunthe pressuresaresogreatagainstthegasesthatdespitethehightemperature theremaybeasmallsolidcore.Howevernoonereallyknowssincethecenter oftheSuncanneverbedirectlyobserved.Solarastronomersdoknowthatthe Sunisdividedintofivelayersorzones.Startingattheoutsideandgoingdown intotheSunthezonesarethecoronachromospherephotosphereconvection zonesandfinallythecore.ThefirstthreezonesareregardedastheSun’s atmosphere.ButsincetheSunhasnosolidsurfaceitishardtotellwherethe atmosphereendsandthemainbodyoftheSunbegins.TheSun’soutermostlayer beginsabout10000milesabovethevisiblesurfaceandgoesoutwardfor millionsofmiles.ThisistheonlypartoftheSunthatcanbeseenduringan eclipsesuchastheoneinFebruary1979.Atanyothertimethecoronacanbe seenonlywhenspecialinstrumentsareusedoncamerasandtelescopestoshut outtheglareoftheSun’srays.Thecoronainbrilliantpearlywhitefilmy lightaboutasbrightasthefullMoon.Itsbeautifulraysareasensational sightduringaneclipse.Thecorona’sraysflashoutinabrilliantfanthat haswispyspike-likeraysneartheSun’snorthandsouthpoles.Thecoronais thickestattheSun’sequator.Thecoronaraysaremadeupofgasesstreaming outwardattremendousspeedsandreachingatemperatureofmorethan2million degreeFahrenheit.Theraysofgasthinoutastheyreachthespacearoundthe planets.BythetimetheSun’scoronaraysreachtheEarththeyareweakand invisible.Gasesaremainpartinthecoronarays.
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