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执行如图所示的程序框图，若输出的结果是5，则判断框内m的取值范围是 ．
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执行如图所示的程序框图若输出的结果是8则判断框内m的取值可以是
30
. 42
56
72
执行如图所示的程序框图若输出的结果是8则判断框内m的取值范围是
(30，42]
(42，56]
(56，72]
(30，72)
某程序框图如图所示则输出的结果是____________.
执行如图所示的程序框图若输出的结果是 8 则输入的数是____________.
某程序框图如图所示判断框内为k≥nn为正整数若输出的S.＝26则判断框内的n＝
6
3
4
5
执行如图所示的程序框图算法流程图输出的结果是
5
6
7
8
某程序框图如图所示若输出的S=57则判断框内为
k＞4?
k＞5?
k＞6?
k＞7?
已知程序框图如图所示其输出结果是__________.
执行如图所示的程序框图若输出的b的值为16则图中判断框内①处应填
2
3
4
5
执行如图所示的程序框图若输出的结果是7则判断框内m的取值范围是
（30，42）
（30，42]
（42，56]
（42，56）
执行如图所示的程序框图则输出的结果是
8
9
10
11
执行如图所示的程序框图输出的结果是
5
7
9
11
如图所示的程序框图输出的结果是S.＝720则判断框内应填的条件是
i≤7
i>7
i≤9
i>9
执行如图所示的程序框图若输出的结果是6则判断框内m的取值范围是
（30，42]
（20，30）
（20，30]
（20，42）
执行如图所示的程序框图输出的结果是________.
某程序框图如图所示若输出结果是126则判断框中可以是
i>6?
i>7?
i≥6？
i≥5?
执行如图所示的程序框图若输入 x = - 5 则输出的结果是_______.
执行如图所示的程序框图输出的结果是
5
6
7
8
某程序框图如图所示若输出的S.＝57则判断框内为
k>4?
k>5?
k>6?
k>7?
执行如图所示的程序框图若输出的结果是 8 则输入的数是__________________.
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TheWorld'sGreatestBookstores CafebreriaElPénduloMexicoCityMexico PartcafepartcoffeehousepartbarandpartbookstoreCafebreriaElPénduloislocatedinMexicoCity.Bookslinetheshelvesfromtheceilingtothefloorandliveplantsaddlotsofgreen.Thestoreisnamedforahugependulum钟摆hangingfromitsceiling. StanfordsLondonandBristolEngland Establishedin1853Stanfordsboaststhatitofferstheworld'slargestselectionoftravelbooksandmaps.Italsosellstravelaccessories.LookfortheenormousNationalGeographicMapoftheWorldintheflagshipstoreinLondon;itwascreatedin2003tocelebratethestore's150thbirthday. RizzoliNewYorkCityNewYork ForalmostahalfcenturyRizzolihasbeenconsideredasoneofthebestindependentbookstoresintheUS.Itspecializesinillustrated有插图的booksaboutthewaypeopleworksandlivessuchasfashionphotographydecorationdesigncookingandarchitecture.Takeamasterclassinflowerdesignattendalectureandbooksigningordropinforacookingshoworbookalaunchparty. ElAteneoGrandSplendidBuenosAiresArgentina Oftendescribedasoneoftheworld'smostbeautifulbookstoresElAteneoishousedinanhistorictheatermuchasitwaswhenthetheateropenedin1919.Aftercustomersbrowsetheshelvestheycandrinkcoffeeandlistentomusicfromastagehiddeninredcurtainswheretangodancersonceperformed.Whilemostofthestore'sbooksareinSpanishtheyareavailableinarangeofsubjects. 1WhatisCafebreriaElPéndulonotedfor? A.Thelargershelves. B.Itsuniquesymbol. C.Thetastycoffee. D.Itsinterestinglocation. 2Whichbookstoreisthebestchoicefortravellerstobuyatouristhandbook? A.Rizzoli. B.Stanfords. C.ElAteneoGrandSplendid. D.CafebreriaElPéndulo. 3WhatsubjectarebooksinRizzoliabout? A.History. B.Cartoon. C.Lifestyle. D.Literature.
15分Worldwideeachperson15yearsandolderconsumes13.5gramsofpurealcoholperdayaccordingtotheWorldHealthOrganization.1considerthatnearlyhalfoftheworlddoesn'tdrinkatallthatleavestheotherhalfdrinkinguptheirshare. Alcoholcanhave2significanteffectonyourgoodlooks.Firstitdehydrates使脱水you.Thatcanleaveyourskinlookingparchedandwrinkled.It'salso3linktorosaceaaskinconditioncausingrednessandswellingonyourface. Whileyou'redrinkingyourliver肝脏4processasingledrinkwhichisonaverageanhourbutvaryingforeveryone;someofitleavesyourbodyviayourbreathandsweat. Anotherreason5drinkingcanaffectyourlookshastodowithsleep6evenalittlebitofalcoholcanhelpyoufallasleep7rapidasthealcoholleavesthebodyyoumaysufferthe'reboundeffect.Insteadofstayingasleepthebodyenterslightersleepandwakefulnesswhichappearstoget8badifonedrinksmore.Alackofsleepleadstodarkcirclespuffyeyesandstress.Keepitupandyou'relikely9seemoresignsofagingandamuchlower10satisfywithyourappearance. Sothenexttimeyouheadtothepubforatippleortworemember:Youcouldbepayingapriceforallthatfun
WHO'SWHOINTHEZOO? IsitamazingthattheWHO'SWHOINTHEZOOmakesitfunforyoungchildrentosave?WiththehelpofStandardBank'sKidzAPPandtheBigFiveanimalfriendsteachingyourchildrenaboutmanagingtheircashhasneverbeenmorefun.LettheWHO'SWHOINTHEZOOshowyourlittleoneswhatitmeanstoearnandsavemoneyaswellasshareintheenjoymentofspendingtheirwell﹣earnedcash. Elephant Asyourchildrenusethemobileapptocompletevariousactions﹣achievingsavingsgoalscompletingmissionsandachievingwishes﹣herevariousmedalswillberewarded. Earnedmedalsaredisplayedintheelephanthabitataswellaslockedmedalsstilltobeachieved. Leopard Rewardyourkidswithpocketmoneyforcompleting‘missions':householdchoresachievementsetc. Youcancreateamissionforyourchildoryourchildcanrequestanewmission.Oncecreateditmustbeaccepted.Themissionneedstobecompletedbyyourchildandapprovedbyyoubeforeyoucanpayhimorher. Lion Helpyourchildrencreateandfulfilwishes.Wishcardsandtheirsavingsprogresscanbetrackedfromyourbankingapp. Oncetheirsavingsgoalisreachedlionwillinformyouoftheirachievement. Buffalo Kidzcanrequesttowithdrawcashorpurchaseairtimeanddatausingtheirsavings. Rhino Rhinoshowsyourchild'slatestaccountbalanceandtransactions. DownloadtheStandardBank'sKidzAPPfromAppleAppStoreonthephone.UsethecommentsectiontointeractwithotherStandardBankcustomersandbankconsultants. 1WhatistheWHO'SWHOINTHEZOOdesignedfor? A.Playersofboardgames. B.Kidsforself﹣servicebanking. C.Parentsforonlinebanking. D.Travelersinthezoo. 2Rewardswillbepaidif. A.thekidsfulfilyourcreatedmissions B.yourkidsgetenoughlockedmedals C.youkeeptheaccountbalanced D.youapprovetherequestviaKidzAPP 3Whichofthefollowinganimalsisrelatedtospending? A.Rhino. B.Leopard. C.Lion. D.Buffalo.
Forsomepeoplegoingtoamuseumisanenjoyableexperience.1Howtomakemuseumsandtheirlifelesshistoricalcollectionsmoreappealing?Thisisatoughquestionthatisworthstudying. NationalTreasureaculturalexplorationprogrammewhichbegantoaironChannel3ofCCTVonDec.32017maybeagoodanswer.2. Theshowusescreativewaystoarouseinterestinthecollectionsmuseumshold.ItpresentstreasuresthroughdifferentartisticmethodsandfullyexplainsthestoriesandhistorybehindeachculturalrelicsothataudiencescannotonlyunderstandhowtoappreciatethebeautyofculturalrelicsbutalsoknowthecivilizationtheycarryandthespiritofChineseculturepreservedovertheyears.3. Theshowusesdifferentmethodsincludingdramaticperformancesanddocumentary﹣stylestorytellingtoshowthebackgroundstoriesofseveralnationaltreasures.4Whileexplainingthemysteriesbehindthetreasures.thenationaltreasurekeeperseitherfamouspeopleorordinarypeoplealsotelltheirownstories. 5ThepopularityofMastersinForbiddenCity我在故宫修文物a2016documentaryfeaturingtheForbiddenCity'sculturalrelicsencouraged15000collegestudentstoapplytoworkatthePalaceMuseumlastyear.TheshowNationalTreasurewilltouchmillionsofpeople'sheartsandencouragemorepeopletovisitmuseums. A.Forothers.it'sjustseveralhoursworthofyawning. B.Eachtreasureispresentedbyanationaltreasurekeeper. C.Itisanexcellentexampleofmakingancientrelicsalive. D.HongKongactorTonyLeungforexampleisoneofthekeepers. E.Watchingtheshow.youjustcanthelpbeingproudofChineseculture. F.Museumsaretreasurehousesthatgiveunderstandingintodifferentcultures. G.Actuallyshowspromotingtraditionalrelicshavebecomemorepopularrecently.
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ThecityofSanFranciscoisawonderfultouristattractionthatoffersmanydifferentthingstoseeanddo.Thebestwayforatravelertogetagoodlookatthecityistotakeoneofthemanydifferenttoursthere TourtheCityonFoot Whentouringthecitybywalkingyouaren'tgoingtowalkmuch.What'smoretherearefarmorebenefits.Thiskindoftourallowsyoutoseeasmanybuildingsofthecityaspossible.Atourofthecityonfootusuallyfocusesonamorelocalizedneighborhoodlevelwhichcanbeveryinterestinginanumberofdifferentways HittheWatersofSanFranciscoBay ThewatersofSanFranciscoBayhaveplayedanimportantroleinthecity'sdevelopmentoverthelastcentury.TouringSanFranciscofromthewaterisacompletelyuniquewayforyoutoseethiswonderfulcity. TakeaBusTour Ifyouwanttoseeawidevarietyofattractionsfromalloverthecity.oneofthebestthingsyoucoulddoistobookatourthroughourcompanythatoffersserviceshere.AbustourofSanFranciscoisoneofthemostcompletewaystoexperiencethecity. TourSanfranciscoFromtheAir WhileitisoneofthemostexpensivewaystoseeSanFrancisco.touringthecityfromtheairisoneofthemostuniqueandthrillingwaystoseethecity.SeeingthecityfromhighaboveallowsyoutogetafullviewofthecityastourguidespointoutattractionsfromhighaboveIfyoudodecidetotourSanFranciscobyairyou'llbecreatingmemoriesthatyouwontforgetforever. Weareatravelagencyprovidinghigh﹣qualityservicesanddiscounts.Formoreinformation.pleaseclickhere 1HowshouldyoutourSanFranciscotobestappreciateitsbuildings? A.Byair B.Bybus C.Onfoot D.Byboat 2WhatcanwelearnabouttheWatersofSanFranciscoBay? A.Theyhavehigh﹣qualityseawater. B.Theyareexploredonalocalizedlevel C.Theywerenotinuseuntilthelastcentury D.Theyhavehelpedthecitytodevelopfurther 3Whatistheauthor'spurposeinwritingthetext? A.TointroduceSanFrancisco B.Toadvertiseforatravelagency C.ToshowwhattodoinSanFrancisco D.TopersuadepeopletovisitSanFrancisco
AnattendantatapopulargardenintheheartofTokyohascostthefacilitymillionsofyenbecausehewastoofrightenedtoaskforeignvisitorstopaytheadmissionfee.Theattend﹣antwhoisinhisearly70sadmittedfailingtocollectthefeesforShinjukuGyoennationalgardenafteraninvestigation调查wasconductedfollowingatip﹣offbyanotheremployee. Theunnamedmanwhohassinceretiredreportedlysaidhehadstoppedcollectingadmissionfeesof200yenforadultsand50yenforchildreninApril2014andhadcontinuedtodosoforabouttwoandahalfyears.Asaresultapproximately160000peopleenteredthegarden一locatedashortwalkfromShinjuku'sskyscrapersandtheworld'sbusiestrailwaystation一withoutpaying.Theenvironmentministrywhichmanagesthegardensaidthisweekthatithadlostatleast25millionyenasaresult. Themansaidhestoppedaskingforeignnationalsforpaymentsafterhewasonceyelledatbyaforeignerbecausehedidn'tspeakgoodEnglishandafterwardsfelttooscaredtospeaktonon﹣JapanesevisitorsShankeiShimbunreports. Themanhandedoutticketswithoutchargingforthemandthenaskedacolleaguewithaccesstothegarden'sdatabasetocancelthesalessotherewouldbenodifferencebetweenrecordedandactualincome.TheruseworkeduntillateDecember2016whenanothermemberofstaffwitnessedhimbehavingstrangelywhengivingatickettoaforeignvisitorandreportedittothemanagement. Theemployeewasfined10%ofhissalaryaccordingtotheShankeiShimbunnews﹣paper.Heaskedtotakeretirementandofferedtoreturnhalfofhisretirementbonusorabout300000yen. 1WhydidShinjukuGyoennationalgardenloseabigfortune? A.ItwassituatedinaremotepartofTokyo. B.Itofferedfavourablepricetoregularforeigners. C.Aticketsellerallowedforeignvisitorsinfreeofcharge. D.Aticketsellerkeptbacksomeadmissionfeesforhimself. 2Accordingtothemanwhatmadethenon﹣Japanesevisitorimpolitetohim? A.Hisuglyappearance. B.Hisserviceattitude. C.Hisdelayedreaction. D.HispoorspokenEnglish. 3WhatdoestheunderlinedwordruseinParagraph4referto? A.Duty. B.Wisdom. C.Trick. D.Guidance. 4Whatdoestheauthorthinkoftheticketseller? A.Hewasshyandfearful. B.Hewasfriendlyandscared. C.Hewashonestandgenerous. D.Hewasmodestandconsiderate.
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如图所示在粗糙的水平桌面上有均可看做质点的物体A和BAB与桌面间动摩擦因数均为μ＝0.1物体B静止在桌面的右边缘．mA＝mB＝1kg现有一水平恒力F＝3N作用在A上使A由静止向右运动在与B发生弹性碰撞前的瞬间撤去F已知AB间的L＝1m桌面的高度h＝0.2m重力加速度g＝10m/s2求 1物体A与B碰撞前速度v1的大小 2物体B被撞飞出后的水平位移x．
Thehemlock铁杉treesalongtheWappingerCreekNewYorklookhealthy.HoweverscientistGaryLovettsaysthewhiteballswhichprovideprotectionforthebugsarecreatedbyatinyinsect.It'shardtobelievethetinybugcouldkillatree.Howevertreescanendupwithmillionsandmillionsofthepests.Whentherearethatmanyitendsupkillingthetree. ThebugfromEastAsiaisslowlykillingtreesacrosstheUSA.Thetrouble﹣makingbugisjustoneofmanyinvasive入侵的peststhathaveslippedintotheUnitedStates.Theycanhurtotherlivingthingsintheirnewhome. Manyinvasivepestsarriveonwoodenpalletspiledinsideshippingcontainers.Theysupportandseparategoodsandkeepthemfromslidingaround.Invasivepestsoftentunnelintothepallets.Howcanwestoppestsfromridingonpallets?Lovettsaysnewrulesareneeded.Thecompaniesthatmakepalletsdon'twantmorerules.Congresshasaddedanamendment修正案inthe2018FarmBilltotryandpreventthisproblem.HoweverLovettisnothopefulitwillmakemuchofadifference.Palletsarecheckedbyinspectors.Manyaresprayedwithbug﹣killingpesticide.IbelieveinthesystemsaidBrentMcClendonpresidentofTheNationalWoodenPalletandContainerAssociation.Healsosaidshippingcontainersarecheckedverycarefully. Stilleachyear13millioncontainersareshippedtotheU.S.Eachisfullofwoodenpallets.Lovettsays:Inspectorscan'tpossiblycheckeverything.Allittakesareafewbadpallets;weshouldgetridofwoodenpallets.Hebelievespalletsshouldbemadeofplasticoreco﹣compositewood.Eco﹣compositewoodisamixofwoodfiberandplastic.Insectscannothideintoit.Oneproblemisthatthesechoicescostmore.Theymaybeworththeextramoneythough.InvasivepestscosttheU.S.﹩5billionayear.Treesdon'tjustdieinforests.Theyalsodieincitiesandouryards.Thentheyneedtobereplaced.Thatcostsmoneytoo. 1AllthestatementsareTRUEexceptthat. A.pesticidehasbeenappliedtobug﹣killing B.thecompaniesmakingpalletsdon'twantmorerules C.invasivepestshideinpalletsusedinshipping D.invasivepestsarenativetoWappingerCreek 2Whatcanweinferfromthepassage? A.Bugswon'tbotherthetreeifjustinfewnumbers. B.Bugsruintheshippinggoodsslowly. C.Bugscanbeeasilyspottedbyeyes. D.Bugscovertreeswithwhitesoftballsforprotection. 3WhydoesGaryLovettwanttogetridofwoodenpallets? A.Becauseinsectsmostlydieinthem. B.Becausetheyarethemajorpestcarriers. C.Becausetheyarenotworthextramoney. D.Becauseplasticpalletsareeco﹣friendly. 4Whatdoesthepassagemainlytalkabout? A.Congresscontributesalottodealingwithinvasivepests. B.Effectivemeasureshavestoppedthepestinvasion. C.InvasivepestsareharmingplantsintheUSA. D.EcosystemintheUSAispoorlydamagedbyinvasivewoods.
LettersasawayofcommunicationhavelonggivenwaytophonecallsandWeChatmessages.ButaTVshowLettersAliveishelpingbringthisoldwaytokeepintouchback1thepresent. LettersAlivetook2itideafromaUKprogramLettersLivereleasedin2013.Both3showfeaturefamousactorsandactressesbutthere4benoeye﹣catchingvisualeffectsoranyregularshowbiz娱乐圈activities.Insteadit'sjustaliveevent5remarkablelettersselectedfromawidetimespanandadiverserangeofsubjectsareread.ThereisforexampleapassionateletterfromHuangYongyutoplaywrightCaoYu30yearsagotocriticizehislackof6create. Everyletterislikeasmallpieceofhistory.Byhearingthem7readit'sasifwearebeingsentbackintimetoexperienceamomentthatwewouldotherwiseneverhavehadthechanceto. Comparedto8publishtextslettersalso9naturalcomewithapersonaltouch.AswellascelebratingthepainjoywisdomandhumorLettersAlive10committopromotingChineseliteraturesincefirstrun.
波源S在t＝0时刻从平衡位置开始向上振动形成向左右两侧传播的简谐横波．Sabc和a'b'c'是沿波传播方向上的间距为1m的6个质点t＝0时刻各质点均处于平衡位置如图所示．已知波的传播速度为8m/s当t＝0.125s时波源S第一次达最高点则
已知tanθ＝﹣3则＝
Ofallthepotentialconsequencesofclimatechange一risingsealevelsdesertificationflood一here'sonethatmaynotcatchyourattention;risingtemperaturesareturningyounggreenseaturtle海龟populationsalmostentirelyfemaleaccordingtoanewstudypublishedinCurrentBiology.ThisisoneofthemostimportantconservationpapersofthedecadeDavidOwensabiologistnotparticipatingintheresearchtoldtheWashingtonPost. Thestudylookedat200000nestingfemalesalongtheeastcoastofQueenslandAustralia一hometooneoftheworld'slargestgreenseaturtlepopulations.Researchersfoundalittlefemalesexbias偏差inthecoolersouthernGreatBarrierReefwith65to69percentofbabyturtlesbornfemale.Butinthewarmernorthernparttheyfoundanextremelyfemalesexbiaswheremorethan99percentofyoungturtleswerefemales.Overall86.8percentofadult﹣sizedturtlesintheentireareawerefemales. Withaverageglobaltemperaturepredictedtoincrease4.7degreesFahrenheitby2100manyseaturtlepopulationsareindangerofhigheggdeathandfemale﹣onlybabyturtleproductionthereportwarned.Thetrendofmorefemalesbeingborninwarmerareashasbeenobservedforafewdecadesbutbiologistswereunawareofhowbigtheseximbalancehadbecome. Biologistsconsider84.74degreesFahrenheittobethekeytemperatureforgreenseaturtlestohebornamixtureoffemalesandmales.Acoupleofdegreesbelowandyougetmostlymales;acoupleofdegreeshigherandyougetmostlyfemales. DermotO'GormanchiefadministratorofWorldWildlifeFundAustraliathinksanydangerstoseaturtlesarelikelytoaffectentireoceanecosystems.Therearesomepotentialquickfixeslikesettingupshadeclothtocoolbeachesandreducingturtlefishingtoinsureadultmalesstayinthepopulation.Buttheonlyeffectivesolutionistostopthechangeintheworld'sclimatehesays. 1WhatdidtheresearcherfindinthenorthernGreatBarrierReef? A.Nearlyallbabyturtleswerebornfemale. B.Turtleseximbalanceincreasinglyreduced. C.Therewereequalamountsofmalesandfemales. D.Thereexistedtheworld'slargestpopulationofseaturtles. 2Whatcanwelearnaboutgreenseaturtles? A.Warmertemperaturemeanlessfemales. B.Theirsexrateisdeterminedbytemperature. C.Theireggshatchmorequicklyincoolerplaces. D.Theirnestsproducethehealthiestmalesat84.74°F. 3WhatdoesDermotstressparticularlyindealingwithseaturtleproblem? A.Preventingclimatechange. B.Protectingadultmaleturtles. C.Usingshadeclothtocoolbeaches. D.Banningpeoplefromfishingturtles. 4What'sthemainideaofthetext? A.Seaturtlesreminduswhat'sgoingonintheoceans. B.Climatechangeisturningbabygreenseaturtlesfemale. C.It'stimetorealizethepotentialeffectsofglobalwarming. D.Risingtemperatureshavecausedseriousproblemstowildlife.
IwasstressedoutwhenIwasstudyingformygraduateprogram.Justafewmonthsbeforethegraduation1IhadtoldmymornthatImight2graduateschool.Shelistenedtomy3andsheadmittedforthefirsttimeinourhistoryshewasabit4.Howevershesaidshelovedmeandshe5howmuchstressIwasunder.ThenshetoldmeIwas6thanthisandencouragedmetotakesometimeto7it. SoIdid.IspentthesummerbeforeIwentbacktoschool8whatIhaddonesofarandwhatIhad9todo.Asacreativewriting10Ihadtakenallofmyrequiredcourses.Allthatremainedinmylastyearwere11coursesandmyresearchhours.Ialsohadtwomajorexamsgraduatepapersandtheoral12allduethatyear.Finallywithmymother's13Imanagedtocompletethem. 14mymomIhadafewothergraduatestudentswhoIwasabletospeaktoandprofessors15meintotheirofficeswheneverIneededhelp.They16atmygraduationpartymygoingawaypartyandonmysocialmedia.Graduateschoolwas17stressfulbutwithoutitIwouldneverhaveknownhowstrongandindependentIreallywasandIwouldneverhave18thefriendsIdid. TrustmewhenIsaythatyou19canturnyourcant'sintocansandachieveyourdreams.Allittakesissome20determinationandwillpower. 1A.year B.project C.exam D.anniversary 2A.graduatefrom B.dropoutof C.adjustto D.breakawayfrom 3A.sorrow B.interest C.anxiety D.anger 4A.amused B.embarrassed C.moved D.disappointed 5A.understood B.roved C.promised D.regretted 6A.luckier B.weaker C.cleverer D.stronger 7A.explain B.resist C.consider D.accept 8A.suspecting B.declaring C.guaranteeing D.reflecting 9A.left B.interrupted C.searched D.avoided 10A.tutor B.major C.fan D.model 11A.active B.training C.optional D.writing 12A.argument B.defense C.charge D.bargain 13A.permission B.payment C.encouragement D.control 14A.Regardlessof B.Inexchangefor C.Owingto D.Inadditionto 15A.persuaded B.welcomed C.forbade D.ignored 16A.lookedout B.hungaround C.madeup D.showedup 17A.obviously B.occasionally C.hardly D.hopefully 18A.betrayed B.made C.accompanied D.offended 19A.again B.only C.too D.already 20A.support B.respect C.attraction D.impression
Chinahascompleteditshome﹣grownBeiDouNavigation导航SatelliteSystemBDSwiththesuccessful﹣launchoftwomoreBDS﹣3satellites19inallandhasstartedprovidingservicestocountriesparticipatingintheBeltandRoadInitiativeBRIsincetheendof2018. TheBDSwhichwillcompeteagainsttheUS'GlobalPositioningSystemGPSwillprovidehigh﹣precisionreliablepositioningnavigationandtimingservicesanywhereintheworldbytheendof2020. TheBeltandRoadInitiativeisanambitiousefforttoimproveregionalcooperationandconnectivityinatrans﹣continentalrange.Theinitiativeaimstostrengtheninfrastructure基础设施tradeandinvestmentlinksbetweenChinaandsome65othercountries.ItisalsoexpectedtoincreaseBeijing'sinfluenceinthesecountries. ThisisakeystepfortheBDSdevelopingfromaChinesehomesystemtoaregionalandthenaglobalnavigationsystemsaidYangChangfengchiefdesigneroftheBeiDousystem Chinaplanstolaunchanother11BDS﹣3satellitesbetweentheendof2018and2020.ChinadevelopedtheBDSthroughauniquetechnologicalapproachcontributingChinesewisdomtothetheoryandconstructionofinternationalsatellitenavigationsystems. Altogether18BDSsatelliteshavebeensentintospacein2018makingthisyearthemostintensivelaunchoftheBDSsatellites.Theyimprovedtheirworkefficiencybyreformingthemanagementprocess.Thenumberofsatellitestaffatthelaunchcenterhasbeenreducedbynearlyhalfandthetestingtimebeforelaunchhasbeenshortenedbynearlyathird.IntheCASTproductionbaseinBeijingseveralBDSsatellitesarebeingmanufacturedatthesametime.Theytrytoimproveintelligentmanufacturingcapabilityandcutdownproductiontimes.ConstructionoftheBDS﹣3systemhasaccelerated. OncetheBDSisfullycompleteditwillbethefourthglobalsatellitenavigationsystemaftertheUSGPSsystemRussia'sGLONASSandtheEuropeanUnion'sGalileo.IndiatooisbuildingitsnavigationalsystemcalledtheIndianRegionalNavigationSatelliteSystemIRNSSwithanoperationalnameofNAVIC. 1WhencantheBDSofferglobalservices? A.In2018. B.In2019. C.In2020. D.In2025. 2WhatcantheBDSdonow? A.TaketheplaceoftheGPSoftheUSA B.Watchanyoneanywhereintheworld. C.ControltheBeltandRoadcountries. D.ServetheBeltandRoadInitiative. 3Whatdoesparagraph4mainlytalkabout? A.TheuniquecharactersoftheBDS. B.TheChinesetechnologyoftheBDS. C.TheeffortsofthestaffoftheBDS. D.ThedifficultiestheBDShastodealwith. 4Whatcanbethebesttitleforthetext? A.China'sBDSisapproachingitsgoalstepbystep B.China'sBDShasbecomethefourthglobalsatellitenavigationsystem C.China'sBDShelpsBRIincreaseBeijing'sinternationalinfluence D.TheuniquetechnologicalapproachmakesChina'sBDSoutstanding
Eveniftreescannotwalktheyarestillonthemove. InpartsoftheArcticentireforestsaremovingnorthward.AcrosstheArctictemperaturesarerisingfasterthananywhereelseintheworld.Asthathappensthetreelinethatmarkswhereforestsstopandthetreelesstundra冻原startshasbeenshiftingnorthward.Treesgrowingalongthetreelinemustprotectthemselvesfromthecoldwind.Todothisplantstendtogrowhorizontal水平的brancheslowtotheground.Theenergyittakesfortreestogrowthiswaymeanstheydonthaveenoughenergytomakeseeds ButasEarthsclimatehasbeenwarming.treesnolongerhavetojustgrowhorizontally.Manycaninsteadgrowuptowardthesky.Thistakeslessenergy.Andwithallthatleftoverenergythesetreeshavestartedproducingmoreseeds.Thishappensespeciallyinplaceswherewhitespruce白云杉grows. WhitesprucewhichisaNorthAmericantreeisquiteabletoproducealotofseedswhichcanmovelongdistancesinthewind.Whenwind﹣blownseedsenduponthetundrabeyondthetreelinetheyeventuallycansprout发芽newtrees.Thisexplainshowaforestcanmove.Ofcoursetheprocesswouldworkonlyifthetundrawerewarmenough.Butinrecentyearsthewholeplanethasbeenwarming. Newtreeswillprovidesheltersforsomesnowkeepingthesunsraysfrommakingthewhitesurfacedisappear.Insteadthetreesabsorbthesunsheat.Thiswarmsthesurroundingair.Theextrawarmthencouragesevenmoretreestoproduceseeds.Thatfurtherboostsaforestsabilitytoexpand.Inadditionmoretreeswilltrapmoresnowpreventingmuchofitfrombeingblownaway.Snowcantrapheatinthesoilbelowwhichencouragestreestogrow.Therecentriseoftemperatureshashelpedmoretreesgrowpastthetreeline.Peopleworryaboutimpactsontheanimalsthatdependonfrozenconditionsforfoodandshelter. 1WhatisthemaincauseofthetreesintheArcticmovingnorthward? A.Thehighertemperature B.Theabundantresources C.Thefierceandcoldwind D.Theshrinkingofnortherntundra 2WhatdoestheunderlinedwordthisinParagraph2mean? A.Toproducemoreseed B.Toresistthecoldwind C.Tomovenorthward D.Torespondtotheclimatechange 3Whatcanbeinferredfromthelastparagraph? A.Newtreescantrapthesnowwhichmaymakethesoilcolder B.Thetrappedsnowpreventsnewtreesfromproducingmoreseeds C.Newtreescanmakethesurroundingairwarmer. D.Newtreescanbringmorefoodandsheltertolocalanimals. 4Thepassageismostprobablytakenfrom. A.asciencereport B.anagriculturereport C.asciencefictionmagazine D.anastronomymagazine
BackinJanuaryIwaswatchingacollegefootballgameandcametoarealization:AsahighschoolseniorprettysoonI'llbethesameageassomeofthetopathletesintheworld. Thisrealizationwasbothconfusingandcomforting.UntilthispointI'dalwaysthoughtoftopathletesinanothergeneration.IhadnorealconnectiontopeopleinthenewsorplayingsportsonTVbecausetheyweresomucholder.Butprettysoonpeopleofmyagewillbetheonesdominating支配thenews. ThecomfortcameinunderstandingthatasIpreparetograduatefromSanfordH.CalhounHighSchoolinMerrickI'mnotthatfarofffromenteringtherealworldandIwillhaveachancetomakeanameformyself. RightnowI'mattheendofoneoflifestageswithmanymoretocome.Asseniorsmanyinmyclassdevelopedsuperioritycomplexes.We'dseebabyfacedninthgradersandthinkUghthoseannoyingfreshmen.Orwe'dhearjuniorscomplainaboutstartingthecollegeapplicationprocessandsaytoeachotherThosejuniorshavenoideawhatthey'retalkingabout.Ofcourselastyear'sseniorssaidthesamethingaboutlastyear'sjuniorsrepeatingatimelesscycle. PsychologistandauthorThomasArmstrongwritesthatlifeismadeupof12stages.Hestressesthatnostageismoreimportantthananotherandeachhasitsownuniquegifts.Thereisnohighestpointinlifenoimpressiveendingwhenyouareaboveeverybodyelse.Atthesametimethereisnolowestpointinlife;atnopointisahumanworthlessandbelowothers.Justasaninfantisn'tbeloweveryoneelseoureldersaren'taboveeveryoneelse. 1Whatcanweknowabouttheauthor? A.He'llfinishhishighschoolstudiesaboutoneyearlater. B.Reflectingonthepastisapartofhisdailyroutine. C.Footballisaparticularfavoritewithhim. D.Hedreamsofbeinganexcellentathlete. 2Whydidtheauthorfindhisrealizationcomforting? A.Thetopathletesarethesameageashim. B.Thereisapossibilitythathecanbefamous. C.Hewillbeadmittedtohisdreamuniversity. D.He'smadefullpreparationsforenteringsociety. 3WhatdoestheunderlinedphrasesuperioritycomplexesinParagraph4mean? A.Ahabitofmakingcomplaints. B.Ahabitoffollowinginothers'footsteps. C.Afeelingthatyouarebetterthanothers. D.Afeelingthatothersareunapproachable. 4Whatmessageisconveyedinthelastparagraph? A.Lifeismeanttobelivedandenjoyed. B.Lifeisneversmoothfullofupsanddowns. C.Oneshouldtrytoreachhisgreatestpotential. D.Everyonehastheirownvalueandpositioninlife.
Areyoucontentwiththeshapeofyournose?Ifnottheclimatemaybetoblamenotyourparents. AccordingtoarecentstudycarriedoutbyscientistsfromPennsylvaniaStateUniversityUSclimateplayedakeyroleinshapingournoses.Thefindingswerebasedonanexaminationofthesizeandshapeofnosesof476peoplefromfourregions﹣WestAfricaEastAsiaSouthAsiaandNorthernEuropeusing3﹣Dfacialimagingtechnology. PeoplehavethoughtforalongtimethedifferenceinnoseshapeamonghumansacrosstheworldmayhavearisenasaresultofnaturalselectionbecauseofclimateArslanZaidioneoftheleadauthorsofthestudytoldTheGuardian.ButwhilepreviousstudieswerebasedonmeasurementsfromhumanskullsZaidiandhisteamlookedatnoseshapeitself. Theresultshowedthatwidernosesaremorecommoninwarmandhumidclimatewhilenarrowernosesaremorecommonincoldanddryclimate.ThatZaidisaidcouldbebecausenarrowernasalpassageshelptoincreasethemoisture潮湿contentofairandwarmitwhichiseasieronourlungs.Thisinturnledtoagradualdecreaseinnosewidthinpopulationslivingfarawayfromtheequator. MorestudiesarestillneededtotestthelinkbetweenclimateandnoseshapebutZaidibelievesthecurrentfindingsarevaluableinunderstandingpotentialhealthissues.AswebecomemoreofaglobalcommunitywearegoingtocomeacrossclimatethatwedonotadapttohetoldTheGuardian.Thismeansmovingtoaverydifferentclimatemightincreasetheriskofbreathingproblems. HoweverheaddedThismaynotbenecessarilytrueforvariousreasonssuchasofmodernmedicineandthefactthatourcurrentclimateisverydifferentfromwhatitusedtobe. 1FromthepassageweknowmostpeoplefromSingaporehavenoses. A.wider B.narrower C.smaller D.larger 2Narrowernosesarehelpfulto. A.cooltheair B.warmtheair C.takeinmoreoxygen D.drytheair 3Whatcanbelearnedaboutthestudy? A.Zaidi'steammeasuredhumanskullsusing3﹣Dtechnology. B.Theshapeofournosesisdeterminedbyourparents. C.Noseshapehelpspeopleadapttotheenvironment. D.It'scertainthatpeoplewillsufferfrommorebreathingproblems. 4Whichofthefollowingcanbethebesttitleforthepassage? A.Whatfactorsshapenoses? B.Howtomakeyournoseattractive? C.Noseshapecausesbreathingproblems D.Climateshapesnoses
如图1水平地面上边长为L的正方形ABCD区域埋有与地面平行的金属管线．为探测金属管线的位置走向和埋覆深度先让金属管线载有电流然后用闭合的试探小线圈P穿过小线圈的磁场可视为匀强磁场在地面探测如图2所示将暴露于地面的金属管接头接到电源的一段将接地棒接到电源的另一端．这样金属管线中就有沿管线方向的电流．使线圈P在直线BD上的不同位置保持静止时线圈平面与地面平行线圈中没有感应电流．将线圈P静置于A处当线圈平面与地面平行时线圈中有感应电流当线圈平面与射线AC成37°角且保持静止时线圈中感应电流消失．下列说法正确的是已知sin37°＝0.6cos37°＝0.8
假定你是李华你的朋友Peter想了解你校于五月举办的中国传统文化艺术节.请你给Peter写封回信内容包括: 1.举办艺术节的目的; 2.介绍你最喜欢的一个艺术节活动; 3.邀请Peter参加并告之艺术节活动的时间. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
某同学为了探究物体的质量不变时加速度跟合外力的关系．将力传感器固定在小车上然后把绳的一端固定在传感器挂钩上用来测量绳对小车的拉力根据所测数据在坐标系中作出了如图所示的a﹣F图象．由于疏忽实验者忘记了平衡摩察力将带滑轮的长木板固定在水平的桌面上了． 1实验中是否需要钩码的质最远小于小车和传感器的总质量填“是“或“否” 2由图象求出小车和传感器受到的摩擦阻力为N总质量为kg
Wheneveryoufeelcold.thefirstthingyoudoistoputonmoreclothes.Butitcanhappenthatyoucanfeelcolderwhenyougooutsidewiththesameamountofclotheson1youdoindoorsWhyisthis? AccordingtoTheConversationthereason2lieincoldreceptors接收器intheskin.Whenthetemperaturedrops.thesereceptorssend3signaltotellthebrainthebodytemperature.Thenbraincreates4awareoffeelingcold. 5wearmoreclothesathomeleadstoaveragebodytemperaturebeingraised.Thenthereceptorssendthebrainthesignalofa6hightemperature.Howeverwhenyougooutsideyournervoussystemlearnsthetemperature7yourskin.inparticulartheface.Asaresultthedifferenceintemperatureisnowgreaterandyoufeeltheairiscolderparticularlyonthe8exposeskin. 9accordingtoTheSun.onceyougetoveryourinitialsenseofcoldnessyourcoatwillstilldoitsjobandyou10feelitsbenefit.
假定你是李华你每周日上午都会去交换生Alice那里教她制作中式早餐.本周日的安排因你爷爷生日而改到下午.请你给她写封邮件内容包括: 1.本周学习时间变更及原因; 2.本周学习内容:制作包子steamedstuffedbun; 3.课前准备:面粉猪肉及蔬菜. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
在锐角△ABC中若A＝30°BC＝4AC＝4则角B的大小为
Iwasalovelychildwithalovingfamily.Iwasnotan1butaleaderinschool.Butwhatmademespecialwasnotseenfromtheoutside:Iwas2aboutlife.Mybestqualitywasmypersonality. Atagetwelvemylifehadabreakdown.ItwasthenthatIdevelopedOCD强迫症.Iwasnolongerthe3girl.IfinallytoldmymotherIwassufferingfromdepression.Istartedtakingmedicine4themedicinedidhelp.Butonethingdidn't5:Istillwasoverwhelmedwithdepression.Istillwas6sadandIstartedtobelievethatmylifenolonger7. Thinkingmylifenolongerhad8.Idecidedleavingtheworldwasthesolution.IwroteanotetoallmyfriendsandfamilyexpressingIwas9forleavingthem.AsIwasfoldingthenotemyeyesfellonaphotograph.Itwasalittlegirlwearingacarefreesmile. Ittookmeafewminutesto10whothegirlinthephotowas.I11couldn'tbelievethatsmilingchildwasme!Itseemedmyyoungerselfhadsentmea12.RightthenandthereIknewIcouldn't13myself.OnceIhadbeenastronggirlandIhadtobelikethatagain.IsworeIwouldn'tonly14mymedicine.Iwouldfightthedepressionwithmy15too. It'sbeentwoyears16Irecovered.TherealreasonI'm17isthatIrefusedtoletdepression18mylife.Ilearnedalifelong19:Nevergiveup.Lifeisgood.Everyonehas20inlifebuteveryonecansurvive.Iamlivingproofofthat. 1A.follower B.winner C.listener D.organizer 2A.curious B.upset C.concerned D.enthusiastic 3A.beautiful B.brave C.happy D.casual 4A.Afterall B.Infact C.Inaddition D.Bychance 5A.matter B.occur C.change D.arrive 6A.occasionally B.constantly C.naturally D.rarely 7A.counted B.existed C.turned D.appeared 8A.destination B.advantage C.impact D.meaning 9A.grateful B.sorry C.responsible D.suitable 10A.explain B.assume C.realize D.acknowledge 11A.never B.only C.still D.even 12A.chance B.letter C.greeting D.message 13A.forgive B.kill C.control D.betray 14A.relyon B.takeover C.bringin D.pickout 15A.mind B.choice C.decision D.imagination 16A.after B.since C.before D.when 17A.educated B.praised C.healed D.accepted 18A.break B.define C.fail D.ruin 19A.memory B.story C.lesson D.concept 20A.challenges B.promises C.opportunities D.options
Wearesurroundedbymessagestryingtogetourattention.Advertiserspoliticiansandothergroupsalltrytogetustoagreewiththem.1.Propagandaisnotalwaysabadthingbutitoftenhidesthetruthaboutatopic.It'sverysimilartoadvertisingwhosegoalistogetpeopletobuysomethingwhilepropagandaistochangewhatpeoplebelieve. PropagandaTechniques Tocreatepropagandaacommontechniqueisname﹣calling.Apoliticianmightcallsomeoneatraitororliarwhichmakestheotherpersonlookbad.Anotheristhetrendtechnique.Peoplewanttobeonthesideinthefavor.2.Somepropagandaisbasedonfear.Itscarespeopleintochoosingacertainsideortakingactionwhichmightnotbebad.Anti﹣smokingcampaignsareoneexample.Theymayscarepeopleintothinkingthatiftheysmoketheywillgetcancer. 3Propagandaisusedbymanygroupssuchasbusinessespoliticiansandthegovernment.Itisspreadthroughposterstelevisionandradio.TheInternetmakesiteasytosendmessagestothewholeworld. TypesofPropaganda Politicalpropagandahasbeenaroundaslongastherehavebeenpoliticians.4.Peoplehaveuseditformanyyears.WarpropagandabeganduringWorldWarImorethan100yearsago. Toseeifpropagandaissayingthetruthpeopleneedtodoextrawork.Forexampleadsmightalwayssoundlikethey'retrue.Butbeforeyoubelievethemtrytothinkaboutwhocreatedandpaidforthem.Findoutwhytheydidit.5. A.PropagandaTargets B.PropagandaMediums C.Anotherwordforthisispropaganda D.Somostpeoplewillagreewiththosepoliticians E.Thenyoucandecideifthey'rebeinghonestornot F.Howeverreligiouspropagandawasactuallythefirstofficialone G.Peoplemightjoinsomeonewhoclaimstobepopularorwinning
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺同处加一个漏字符号˄并在其下面写出该加的同. 删除:把多余的词用斜线\划掉. 修改:在错的词下画一横线并在该词下面写出修改后的词. 注意:1.每处错误及其修改均仅限一词; 2.只允许修改10处多者从第11处起不计分. Lastweekourschoo1holdaphotographycompetitionwhatthemewasAnActofKindness.Moststudentsshowedgreatinterestbutparticipatedinitactively.Theyalsoexchangedpracticalexperience.AlltheworksshownthroughtheWeChatplatformandtheywonhighlypraisefromthepublic.Twentyoutstandingphotogotthefirstprizeandwereawardedbytheirschool. Anactivityofferedusanopportunitytosharesomuchkindness.Itraisedourawarenessofhelppeopleinneed.Whenwedoanactofkindnessforsomeonewe'reactuallygettingsomethinginreturnfor一pleasure.
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