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2、“嫦五奔月”11月24日4时30分,我国在海南文昌航天发射场用长征五号遥五运载火箭成功发射“嫦娥五号”探测器,开启了我国首次地外天体采样返回之旅。这是“嫦娥”第五次踏上探月征程。这次她将为地球采回最新鲜的月球样本,让科学家更多地了解月球的来源和形成。阅读短文并回答问题OnNovember24,ChinalaunchedtheChang’e‒5lunarprobefromtheWenchangSpacecraftLaunchSiteonthecoastofsouthernislandprovinceofHainan,aboardtheheavy-liftcarr
3、ierrocketLongMarch‒5.Chang’e‒5,comprisinganorbiter,alander,anascenderandareturner,withatotaltake-offmassof8.2tonnes,isexpectedtobringbacksamplesfromtheMoonusingacomplicatedtechnologicalapproachwhichincludesunmannedrendezvousanddocking(无人交会对接)inlunarorbit.Afteritentersthelunarorbit,thelan
4、der-ascendercombinationwillseparatefromtheorbiter-returnercombinationinordertotouchdownontheMoon.Within48hours,aroboticarmwillbeextendedtoscoopuprocksandregolith(风化层)onthelunarsurface,andadrillwillboreintotheground.About2kgofsamplesareexpectedtobecollectedandsealedinacontainerinthespacec
5、raft.Thentheascenderwilltakeoff,anddockwiththeorbiter-returnerinorbit.Afterthesamplesaretransferredtothereturner,theascenderwillseparatefromtheorbiter-returner.Whenthegeometric(几何的)relationshipbetweenEarthandtheMoonissuitable,theorbiterwillcarrythereturnerbacktoEarth.ThelandingsiteofChan
6、g’e‒5willbetothewestofthatofChang’e‒3,whichwenttotheMoonin2013.Thissitewaschosenbecausetheregionhasayounggeologicalage,youngerthanthesamplingareasoftheUnitedStatesandtheSovietUnionmorethan40yearsago.Thisregionhasneverbeensampled.Thenewsampleswillbeofgreatscientificvalue.PeiZhaoyu,DeputyD
7、irectoroftheLunarExplorationandSpaceProgramCenteroftheChinaNationalSpaceAdministration,saidiftheChang’e‒5missionsucceeds,China’scurrentlunarexplorationprojectwillcometoasuccessfulconclusion.ItwillalsohelppromoteChina’sscienceandtechnologydevelopment,andlayanimportantfoundationforChina’sf
8、uturemannedlunarlandinganddeepspaceexploration.1.ThemissionofChang’e‒5isto.A.collectandcarrybacklunarsamplesB.monitorchangesofthelunarsurfaceC.achieveunmannedrendezvousanddockingD.performasoftlandingonthelunarfarside2.Whatisparagraph3mainlyabout?A.Theconditionofthelunarsu