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如图表示植物的五种不同的育种方法，请据图回答问题． （1）E方法所用的原理是 ，通过该方法获得优良性状是不容易的，其原因是 ． （2）G一J过程中涉及到的生物工程技术有 ． （3...
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高三下学期生物《》真题及答案
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下图表示五种不同的育种方法示意图请回答下列问题1图中A.→B.→C.的途径表示育种方法与A.D.方向
下面五种不同的育种方法请据图回答问题1图中A.→D.方向所示的途径表示育种方式A.→B.－C.的途径
以下各图分别表示几种不同的小麦育种方法请据图回答1A图所示育种方法是▲其育种原理是▲2B图所示育种方
下图AB分别表示两种培育新品种的原理方法据图回答A图所示的育种方法是育种原理是
育种工作者利用不同的方法进行了如下四组实验请据图回答问题植物组织培养除了需要提供一定的营养温度和光照
下图为五种不同育种方法示意图据图回答1图中A.D方向所示的途径表示的育种方式是＿＿＿＿＿＿＿＿A→B
如图表示五种不同的育种方法示意图请根据图回答下面的问题1图中A.D.方向所示的途径表示杂交育种方式其
以下是五种不同育种方法示意图请据图回答1图中AD表示的育种方法的原理是2B.过程常用的方法是ABC表
如图表示五种不同的育种方法示意图请根据图回答下面的问题1图中A.→D.途径表示育种方式A.→B.→C
植物组织培养是克隆植物的一种方法过程如下图所示请据图回答相关的问题植物组织培养技术不仅应用于花卉果树
假如有两个纯种小麦一个的性状是高秆D易倒伏能抗锈病T另一个的性状是矮秆d抗倒伏易锈病t用这两种纯种小
以下是五种不同育种方法示意图请据图回答1图中①→②表示的育种方法的原理是⑤→⑦→⑧表示的育种方法与⑤
下图为以二倍体水稻2N=24为亲本的几种不同育种方法示意图请据图回答突破物种生殖隔离界限的育种方法是
下面五种不同的育种方法请据图回答问题1图中A→D方向所示的途径表示育种方式A→B－C的途径表示育种方
下图为五种育种方法示意图据图回答问题1图中A.D.方向所示的育种方法的原理是___A.B.C.的途径
图表示五种不同的育种方法示意图请根据图回答下面的问题1图中A.D方向所示的途径表示育种方式A→B→C
下图展示了现代小麦的起源过程据图回答下列问题假如该过程表示一种育种方法这种方法称为
下面五种不同的育种方法请据图回答问题1图中A→D方向所示的途径表示育种方式A→B－C的途径表示育种方
下面五种不同的育种方法请据图回答问题1图中A→D方向所示的途径表示育种方式A→B－C的途径表示育种方
如图是五种不同育种方法的示意图.请据图回答1图中A→D表示的育种方法与A→B→C表示的育种方法都能将
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﹣﹣﹣There'refourbedroomsinthehousewithitsownshower. ﹣﹣﹣That'swhatIwant.I'vegotafewkids. A.either B.neither C.each D.none
Areyouahappypersonoranunhappyperson? Ifyou'reanunhappypersonpleaserememberthathappinessisachoice.1Whatyouneedtodoistomakesomechanges. Unhappypeoplearemorelikelytobelievethatlifeishard.Theyseethemselvesasvictimsoflifewhensomethingbadhappenstothem.Yesasisknowntoalllifecanbehard.2 Unhappypeoplearemorelikelytobelievethatmostpeoplecan'tbetrusted.Theydon'tthinkstrangerscanbetrusted.Unfortunatelythisthoughtslowlystartstopreventthemfrommeetingnewpeople.3Inthiswayyoucanmakemorefriendswhocanincreaseyourhappiness. Unhappypeoplelikecomparingthemselveswithothersandfeeljealous.4Thisiswrong.Insteadyoushouldgetinspiredandtrytoachievemore.Learntobelieveinunlimitedpossibilities.Don'tgetupsetandthinkthatsomebody'slucklimitsyourpossibleoutcomeinlife. Unhappypeopleconsidertheirfuturewithworryandfear.5Unhappypeoplefilltheheadspacewithworryandfear.Howcanyoubehappyifyouarealwaysinworryorfear?Whenfearorworrycrossesyourmindaskyourselfifthereisanactionyoucantaketopreventyourfearorworryfromhappening.Ifthereisn'tjustlayitdownbecauseworryorfeardoesyounogoodatall. Everyonewillprobablyswiminnegativewatersonceinawhilebutwhatmattersishowlongyoustaythere.Followthewaysmentionedaboveandthenyouwillbemuchhappier. A.Butyoushouldhaveapositiveattitudetowardslifeinsteadofcomplainingallthetime. B.Thereisonlysomuchspacebetweenyourears. C.Unhappinessisalsoachoice. D.Youcanchoosetobehappy. E.Youshouldtrytobekindtoothersinordertomakemorefriends. F.Insteadyoushouldbelieveinthegoodinpeopleandstayopenandfriendlytowardspeopleyoumeet. G.Theybelievethatsomeoneelse'sluckisstolenfromtheirown.
AnAmericanphotographerismakingcopiesofgreatartworkavailableforblindpeopleandthosewithverypooreyesight.Atleast285millionpeopleworldwideareeitherblindorconsideredvisuallyimpaired有缺陷的.Theyareunabletoseeorenjoyvisualfineart. RomeoEdmeadlosthiseyesightwhenhewasonlytwoyearsold.Butthathasnotstoppedhimfromlivinglifetothefullest.Hewenttocollageandstudiedjournalism.HenowlivesinNewYork.Hedependsheavilyonhisothersenses.ButhecannotexperiencethegreatworksofartintheCity.Heremembersavisittoanartcollectionwithhisgrandmother.WewenttothismuseumandIjustwanderedoffsomewhereandIstartedtouchingsomethingandallofasuddenalarmwentoff.Andaguardcamerunningoverandmygrandmotherwasallashamed.Romeoisnowabletousehisfingerstofeelartpaintings.Hecangetanideaoftheappearancebyfollowingthemarkings. JohnOlsononceworkedasaphotographerforLIFEmagazine.HedevelopedaprintingprocesstomaketheartofDaVinciandVanGoghtouchableforvisually﹣impairedpeople.Ibegantorealizehowimportantimages影像havebeentomeandwhattheyhaveallowedmetodo.Anditcausedmetowonderwhatitwasfortheblindnothavingaccesstoimages.Olson'scompanyiscalled3DPhotoworks.Itproducescopiesofartworkinthreedimensions﹣heightwidthanddepth.Thewholeprocesscantakeuptofourweeks. Thankstonewtechnology3Dartmaysoonhanginartmuseumsallovertheworld.Itgivesthevisually﹣impairedthechancetoexperiencethebeautyofvisualart. 1WhatmotivatedJohnOlsontomake3Dartforblindpeople? A.Thebenefitofhiscompany. B.RomeoEdmead'ssufferings. C.Hisappreciationtoblindpeople. D.Theimportanceofimagestopeople. 2Whatdoestheunderlinedworddimensionmean? A.aperiodoftime B.thesizeofasituation C.ameasurementinspace D.thewayofdoingthings 3HowwillJohnOlson'sworkinfluencethelifeofblindpeople? A.Theyareabletolivetheirlifetothefullest. B.Theycanhavethechancetofeelthebeautyofvisualart. C.Theydon'tneedtodependheavilyontheirothersenses. D.Theyhavefreeaccesstomuseumswithoutanydifficulty. 4Whatcanwelearnfromthepassage? A.Ittakesamonthorsotoproducea3Dartwork. B.3Dartisproducedbasedonheightanddepth. C.3Dartisdisplayedinartmuseumsallovertheworld. D.JohnOlsonisrichforwhathehasdonefortheblind.
DearMary IreceiveyourE﹣mailjustnow.Don'tworryaboutme.I'mgettingonwellmyresearchworkinthelab.ButtomygreatsurpriseyousayyouwillgiveuplearningEnglish.Thereasonisthatbecauseyouhavenotdonewellinitrecentlyandyouhavelostinterests.I'mafraidIcan'tagreeonyou.IknowitisdifficulttolearnEnglishbutEnglishiswideusedintheworldtoday.Itwillbeimportanttoolinourfuturework.Besideitisbecomingmoreandmoreimportantinyourdailylife.Ifyoustudyhardyouwillsucceed.Dorememberwherethereisawillthereisaway.I'mlookingforwardtoheargoodnewsfromyou.
Ithoughtthepartywaswell组织andeverythingwentwell.
一根轻质弹簧受到拉力作用时其长度会变长且拉力大小与弹簧长度的增加量之比为定值．该比值反映了弹簧的力学性质由此定义该比值叫做弹簧的劲度系数用符号k来表示．如果将两根自然长度相同劲度系数不同粗细也不同的弹簧套在一起看做一根新弹簧设原弹簧A劲度系数为k1原弹簧B劲度系数为k2．现将弹簧AB的一端连接在一起将AB的另一端也连接在一起作为新弹簧记为C的两端C劲度系数为k3．关于k1k2k3的大小关系同学们做出了如下猜想 甲同学和电阻并联相似可能是＝+ 乙同学和电阻串联相似可能是k3＝k1+k2 丙同学可能是k3＝ 1为了验证猜想同学们设计了相应的实验．装置见图甲 2简要实验步骤如下请完成相应填空． ①将弹簧A悬挂在铁架台上用刻度尺测量弹簧A的自然长度L0 ②在弹簧A的下端挂上相同的钩码记下钩码的个数n每个钩码的质量m已知实验室所在位置的重力加速度大小g并用刻度尺测量弹簧的长度L1 ③由F＝计算弹簧的弹力由x＝L1﹣L0计算弹簧的伸长量由计算弹簧的劲度系数 ④改变重复实验步骤②③并求出弹簧A的劲度系数的平均值k1 ⑤仅将弹簧分别换为BC重复上述操作步骤求出弹簧BC的劲度系数的平均值k2k3．比较k1k2k3并得出结论． 3图乙是实验得到的图线由此可以判断同学的猜想正确． 4相类似地定义一个系统在受到拉力作用时拉力大小与系统长度增加量的比值叫做系统的等效劲度系数如图丙中的装置就是我们要研究的一个系统外力竖直向下作用于与动滑轮相连的挂钩上滑轮光滑且质量不计挂钩质量不计细线为不可伸长的轻绳弹簧的劲度系数为k且质量不计．若定义该系统的长度为系统静止时天花板到挂钩最低点间的距离则该系统的等效劲度系数为． A．4kB．2kC．0.50kD．0.25k
假如你叫李华你和你的家人去笔友David所在的城市新加坡Singapore旅游受到David的热情款待回来后你想对他表达自己的感谢之情.请根据以下要点给David写一封信. 1.感谢他的热情款待 2.在新加坡玩得很开心 3.新加坡的风景和美食令人印象深刻 4.邀请他来遵义旅游. 注意1.词数100词左右2.可适当增加细节以使行文连贯. DearDavid Yours LiHua
﹣ExcusemeJohnbutwhichisforme? ﹣Youcantakehalf.Theyareexactlythesame. A.either B.both C.any D.neither
Paynoattentiontothosewholaughatyou.Whatmostishowyouseeyourself. A.matters B.minds C.cares D.counts
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﹣﹣﹣Herfathertriedtothatnothingunusualhadhappened. ﹣﹣﹣Infactitwasnotserious. A.imagine B.pretend C.mean D.warn
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JohnMichaelThomas14Florida WhenJohnMichaelThomasdecidedtohonorhisfriendandclassmateElizabethBuckleywhodiedfromcancerherememberedhowmuchshelovedpeacocks孔雀. Hewantedtobuildalifesizedpeacockfountain喷泉inElizabeth'sfavoriteparkinthecity.Hethoughtitcouldbeaplaceforpeopletorelaxandbeinspired. JohnMichaelraised﹩52000tobuildthefountain. BarrettEngland13Utah ThewheelsbegantoturnforBarrettEnglandwhenheheardaboutKarmaBikeShopaplacewhereyoungpeoplecanearnafreebikebyreadingandperformingcommunity社区service. BarrettvisitedKarma'sownerwithhisideaHewouldcollectandrepairusedbikesanddonate捐赠themtotheshop. Heexpectedtogetabout10donatedbikes.IntheendBarrettreceived39. ZacharyBlohm15Wisconsin The25yearoldplaygroundatanelementaryschoolnearMilwaukeeWis.wassosmallthatonly70ofits575studentscouldplayonitatatime. That'swhenZacharyBlohmsavedthedayHeandsomevolunteersbuiltahugeplayground.ToraisemoneyZacplannedTshirtandbakesalessoldticketsandmore.Heheldmonthlymoneyraisingeventsformorethanayear.Overallhecollected﹩130000﹣enoughtofinishhisproject. JackZimmerman16NewJersey Forsomepeoplefindingamealisassimpleasopeningtherefrigerator.Formorethan366000hungrykidsinNewJerseyit'snotthateasy. Thatfactdidn'tsitwellwithJackZimmermanwhoorganizedadrivetolessenchildhoodhungerinhisstate.Hisgoalcreate40000packagedmealsthatcouldbedonatedtothoseinneed.OngamedayJackandhisvolunteersstartedtheirwork.Afterthefinalcounttheteamhadpackaged47124meals﹣wellaboveJack'sgoal. 1Thepeacockfountainwasbuiltinapark. A.toinspirepeople B.fortheloveofanimals C.inmemoryofateenager D.toencourageacancersufferer 2WhatdidBarrettdoforKarmaBikeShop? A.Hedonatedbikestoit. B.Herepairedbikesthere. C.Hehelpeditwincustomers. D.Heofferedareadingservicethere. 3Whatdothefourpeoplehaveincommon? A.They'retopstudents. B.Theycareaboutothers. C.Theylikevariouspublicactivities. D.They'remoneyraisersforthepoor.
Itdidn'ttakealongtimeforhimto恢复fromhisillness.
Musicisoneofthemostimportantandpowerfulthingsinmylife.1listentomusiccanhelpmotivatemeinhardtimes. WhenIwasyoungerIdidn'thavethegreatlove2musicasIdonow.I3mainlistenedtowhatmyparentswerelisteningto.Ididn'thavemuchofcareformusicalcompositions.WhetherIwasinthecarthehouse4anywhereelsetherewassuretobesomeBeatlesBuddyHollyortheDubliners.NowasI'm5oldIenjoyitasitallowsme6remembermychildhood. Ibelievemusic7havetheabilitytoconveyallsortsoffeelings.Theeffectthatmusiccanhaveonour8emotionisunbelievableasitcanbringpeopletofloodsoftearsorburstsoflaughter. Ibelievemusicaffectspeopleinmanydifferentways.Tomemusicismorethanjust9welistentoorplayit'ssomethingtofeel.Inmylifeitismusicwhichisextremelyimportant10bringsmeclosertomyfriendsandfamily.Ialsofeelthatithelpsmetogetthroughthings.
Manypeoplethinkheroesneedtobehandsomerichorverysmart.Butasformeaheroisapersonwhoalwayshelpsothers. MyheroisUncleBill.Heistheeldestsonofaworkerandhegrewupinapoorfamilywithfouryoungerbrothersandtwolittlesisters.Hehadtogiveupschoolathisveryyoungage.Heworkedandgaveallhismoneytohisparents.Whenhewasgettingolderhefoundthathewasveryinterestedinfixingthings.Hecollectedbrokenthingswhichpeoplethrewawayandfixedthemintogoodones.Hecouldfixalmosteverythingthatdidnotwork.Heworkedhardandnevergaveup.Finallyheopenedhisownrepairshop.Ittookhimabout20yearstobecomeasuccessfulshopkeeper店主. Nowheisveryrichandhasfourothershops.Butheneverforgetsthedayswhenhehadnothing.Hegivesmoneytopoorfamilieshelpspoorkidsbuybooksandoffersthemfreelunches.Healsoencouragespeopletorecyclethings.HealwayssaysMakegooduseofwhatyouhavebecausewejusthaveoneearth.Hevolunteerstocleantheenvironmentinourneighborhood. 1WhatdoesUncleBill'sfatherdo? A.Heisashopkeeper. B.Heisaworker. C.Heisamathteacher. D.Heisafarmer. 2HowmanybrothersandsistersdoesUncleBillhave? A.7. B.6. C.5. D.4. 3WhydoesthewriterthinkUncleBillisahero? A.Heisrichandsmart. B.Heisasuccessfulshopkeeper. C.Healwaystrieshisbesttohelpothers. D.Heisgoodatfixingbrokenthings. 4WhichofthefollowingisTRUEaccordingtothepassage? A.UncleBillisnotgoodatfixingthings. B.UncleBillownsfiverepairshops. C.UncleBillforgetsthedayswhenhehadnothing. D.UncleBillcaresaboutnotpeoplebuttheenvironment. 5What'sthebesttitleforthispassage? A.UncleBill﹣MyHero B.ASuccessfulShopkeeper C.ProtectOurEarth. D.Let'sHelpEachOther.
Themoreyousmiletheyouwillfeel. A.happily B.morehappily C.happy D.happier
goodadvicetheteachergaveme! A.How B.What C.Whata D.Howa
如图所示竖直平面内的直角坐标系中X轴上方有一个圆形有界匀强磁场图中未画出x轴下方分布有斜向左上与Y轴方向夹角θ＝45°的匀强电场在x轴上放置有一挡板长0.16m板的中心与O点重合．今有一带正电粒子从y轴上某点P以初速度v0＝40m/s与y轴负向成45°角射入第一象限经过圆形有界磁场时恰好偏转90°并从A点进入下方电场如图所示．已知A点坐标0.4m0匀强磁场垂直纸面向外磁感应强度大小B＝粒子的荷质比＝×103C/kg不计粒子的重力．问 1带电粒子在圆形磁场中运动时轨迹半径多大 2圆形磁场区域的最小面积为多少 3为使粒子出电场时不打在挡板上电场强度应满足什么要求
IntheUnitedStateswhenonebecomesrichhewantspeopletoknowit.Andevenifhedoesnotbecomeveryrichhewantspeopletothinkthatheis.ThatiswhatkeepingupwiththeJonesesisabout.Itisthestoryofsomeonewhotriedtolookasrichashisneighbors. Theexpressionwasfirstusedin1913byayoungAmericancalledArthurMomand.Hetoldthisstoryabouthimself.Hebeganearning＄125aweekattheageof23.Thatwasalotofmoneyinthosedays.HegotmarriedandmovedwithhiswifetoaverywealthyneighborhoodoutsideNewYorkCity.WhenhesawthatrichpeoplerodehorsesMomandwenthorsebackridingeveryday.WhenhesawthatrichpeoplehadservantsMomandandhiswifealsohiredaservantandgavebigpartiesfortheirnewneighbors. Itwaslikearacebutonecouldneverfinishhisracebecauseonewasalwaystryingtokeepup.TheraceendedforMomandandhiswifewhentheycouldnolongerpayfortheirnewwayoflife.TheymovedbacktoanapartmentinNewYorkCity. Momandlookedaroundhimandnoticedthatmanypeopledothingsjusttokeepupwithrichlifestyleoftheirneighbors.Hesawthefunnysideofitandstartedtowriteaseriesofshortstories.HecalleditKeepingupwiththeJonesesbecauseJonesisaverycommonnameintheUnitedStates.KeepingupwiththeJonesescametomeankeepingupwithrichlifestyleofthepeoplearoundyou.Momand'sseriesappearedindifferentnewspapersacrossthecountryforover28years. PeopleneverseemtogettiredofkeepingupwiththeJoneses.AndthereareJonsesineverycityoftheworld.ButonemustgettiredoftryingtokeepupwiththeJonesesbecausenomatterwhatonedoesMr.Jonesalwaysseemstobeahead. 1SomepeoplewanttokeepupwiththeJonesesbecausethey. A.wanttobeasrichastheirneighbors B.wantotherstoknowortothinkthattheyarerich C.don'twantotherstoknowtheyarerich D.wanttobehappy 2Itcanbeinferred推断fromthestorythatrichpeopleliketo. A.liveoutsideNewYorkCity B.liveinNewYorkcity C.liveinapartments D.havemanyneighbors 3ArthurMomandusedthenameJonesinhisseriesofshortstoriesbecauseJonesis. A.animportantname B.apopularnameintheUnitedStates C.hisneighbor'sname D.notagoodname 4AccordingtothewriteritistokeepupwiththeJoneses. A.correct B.interesting C.impossible D.good 5What'stheauthor'sattitudetokeepingupwiththeJoneses? A.Negative B.Positive C.Objective D.Supportive
Childrenwhohavechancesto探索naturalareastendtolovescience.
如图所示的xOy坐标系中x轴上固定一个点电荷Qy轴上固定一根光滑绝缘细杆细杆的下端刚好在坐标原点O处将一个套在杆上重力不计的带电圆环视为质点从杆上P处由静止释放圆环从O处离开细杆后恰好绕点电荷Q做圆周运动．下列说法正确的是
﹣IlovetheInternet.I'vecometoknowmanyfriendsontheNet. ﹣.Fewofthemwouldbecomeyourrealfriends. A.Ican'tagreemore B.I'mpleasedtoknowthat C.That'sforsure D.That'snotthecase
如图所示长木板AB倾斜放置板面与水平方向的夹角为θ在板的A端上方P点处以大小为v0的水平初速度向右抛出一个小球结果小球恰好能垂直打在板面上现让板绕A端顺时针转过一个角度到图上虚线的位置要让球从P点水平抛出后仍能垂直打在板面上则抛出的水平速度v不计空气阻力
ThereisanoldEnglishsayingLaughteristhebestmedicine.OnepersoncertainlywouldhaveagreedwiththisisNormanCousins. NormanCousinswastheeditorofamagazinecalledSaturdayReviewforalmostfortyyears.Healso1andspokeaboutworldpeaceandanti﹣warissues反战议题travelingtomanydifferentcountriestosharehis2. Inthe1960safterreturningtotheUnitedStatesfromabusyandtiringtriptoEurope.Mr.Cousinsgot3.Hediscoveredhehadastrangediseasethatcausedgreatpaininhisbones骨头. Inlessthanaweekafterhegotbackhecouldnot4it.Everymovethathemadewaspainful.Hewasnotableto5atnight.ThedoctortoldMr.Cousinsthattheydidnotknowhowtocure治疗hisproblemandhemightnever6theillness.Mr.Cousinshoweverrefusedtogiveuphope. Mr.Cousinsthoughtthattheillnesscouldbecausedby7thoughts.Hedidnotwanttotake8tocurehimself.Insteadhefeltthathappythoughtsorlaughtermightcurehisillness. Hebegantoexperimentonhimselfwhilestillinthehospitalbywatchingcomedyshowsontelevision.Mr.Cousinsquicklyfoundthattenminutesof9laughterduringthedaygavehimtwohoursofpain﹣freesleepatnight. Decidingthatthe10couldnothelphimMr.Cousinsleftthehospitalandcheckedintoahotelroomwherehecould11hisexperimentswithlaughter.ForeightdaysMr.Cousins12inthehotelroomwatchingcomedyshowsontelevisionreadingamusingbooksandsleepingwheneverhefelt13.WithinthreeweekshefeltwellenoughtotakeavacationtoPuertoRicowherehebeganrunningonthebeachfor14. AfterafewmonthsMr.Cousinswas15tocarryonhiswork.Hehadlaughedhimselfbacktohealth. 1A.laughed B.taught C.wrote D.copied 2A.magazines B.subjects C.photos D.ideas 3A.rich B.sick C.lonely D.famous 4A.stand B.realize C.face D.improve 5A.dream B.eat C.shout D.sleep 6A.gothrough B.lookafter C.getover D.findout 7A.unhappy B.pleasant C.silly D.clever 8A.food B.time C.medicine D.money 9A.unusual B.false C.real D.wild 10A.friends B.laughter C.experiment D.doctors 11A.begin B.end C.continue D.report 12A.rested B.worked C.studied D.played 13A.well B.tired C.afraid D.worried 14A.help B.exercise C.freedom D.fun 15A.able B.safe C.lazy D.uncertain
IneversawmyfatherhomefromworklateorillnordidIeverseemyfathertakeanightoutwiththeboys.Hehadnobobbiesbutjusttookcareofhisfamily. For22yearssinceIlefthomeforcollegemyfathercalledmeeverySundayat900am.Hewasalwaysinterestedinmylife﹣howmyfamilywasdoing.ThecallsevencamewhenheandmymotherwereinAustraliaEnglandorFlorida. NineyearsagowhenIboughtmefirsthousemyfather67yearsoldspenteighthoursadayforthreedayspaintingmyhouse.Hewouldnotallowmetopaysomeonetohaveitdone.AllheaskedwasaglassoficedteaandthatIholdapaintbrushforhimandtalktohim.ButIwastoobusyforIhadalawpracticetorunandIcouldnottakethetimetoholdthepaintbrushortalktomyfather. Fiveyearsagomy71﹣year﹣oldfatherspentfivehoursputtingtogetheraswingset秋千formydaughter.AgainallheaskedwasthatIgethimaglassoficedteaandtalktohimButagainIhadlaundrytodoandthehousetoclean. ThemorningonSundayJanuary161995myfathertelephonedmeasusualthistimehehadseemedtohaveforgottensomethingswehaddiscussedtheweekbefore.IhadtogettochurchandIcuttheconversationshort. Thecallcameat440am.ThatdaymyfatherwassenttohospitalinFlorida.IgotonaplaneimmediatelyandIvowed发誓thatwhenIarrivedIwouldmakeupforthelosttimeandhaveanicelongtalkwithhimandreallygettoknowhim. IarrivedinFloridaat100ambutmyfatherhadpassedawayat912pm.Thistimeitwashewhodidnothavetimetotalkortimetowaitforme. IntheyearssincehisdeathIhavelearntmuchaboutmyfatherandevenmoreabouteverysingleday. 1Weknowfromthereadingthatthefather. A.likedtopainthouses B.hadnofriendsaroundhim C.wasnothealthyinhisyouth D.thoughtofhisfamilyashisall 2Whenherfatherpaintedherfirsthousethedaughter. A.couldonlyaffordaglassoficedtea B.wastoobusytotalktoherfather C.coulddonothingbutholdapaintbrush D.spenteighthoursadayworkingwithherfather 3OnJanuary161995thedaughterfeltthatherfather. A.seemedtobealittledifferent B.hadnotimetophoneherasusual C.becameinterestedinchurch D.hadforgottentodiscusssomethingswithher 4Inthereadingtheunderlinedphrase‘gettoknowhim'mostprobablymeans. A.gethimtoknowher B.knowmoreabouthim C.gethimtoknowhimself D.makehimwell﹣known 5Whichisthebesttitleofthereading? A.PaintingHouses B.Daughter'sFamily C.FatherandI D.Father'sphonecalls
假定你是李华你的加拿大笔友Susan正在学汉语她给你发来邮件询问你的近况并请你为她推荐﹣本汉语读物.请给她回复邮件要点如下 1.表示感谢 2.介绍你的近况学习生活等 3.推荐中国民间故事ChineseFolkTales. 注意 1.词数100左右 2.可适当增加细节以使行文连贯. DearSusan I'mmorethandelightedtohearfromyou.﹣﹣﹣﹣ Yours LiHua
BeforeweleftLiYanpingexplainedtomethattheforceofgravitywouldchangethreetimesonourjourneyand1thefirstchangewouldbethemostpowerful.Thenwewereoff.Astherocketroseintotheairwe2pullbackintoourseatsbecauseweweretryingtoescapethepulloftheearth'sgravity.Itwasso3strengththatwecouldnotsayanythingtoeachother.GraduallytheweightlessenedandIwasabletotalkto4he.Whyisthespaceshipnotfallingbacktotheearth?OntheearthifIfallfrom5treeIwillfalltotheground.Iasked.Wearetoofar6theearthnowtofeelitspullhe7explainsowefeelasifnogravityatall.Whenweget8closetothemoonlittlebylittleweshallfeelitsgravitypullingusbutitwillnotbeaspowerfulapullastheearth's.Icheeredupimmediatelyandfloated9weightlessaroundinourspaceshipcabin10watchtheearthbecomesmallerandthemoonlarger.
2018年11月21日消息中科院合肥物质科学研究院核能安全所吴宜灿研究员获得美国核学会聚变核能杰出成就奖．关于核反应方程半衰期下列说法正确的是
某载人宇宙飞船绕地球做圆周运动的周期为T由于地球遮挡宇航员发现有T时间会经历“日全食”过程如图所示．已知地球的半径为R引力常量为G地球自转周期为T0太阳光可看做平行光则下列说法正确的是
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