高中英语课时作业（译林版选修第二册）课时作业8

课时作业(八)Unit3SectionⅡGrammarandusage&IntegratedskillsⅠ.阅读理解APeoplewhoaregoodatgrowingplantsknowthatit'spossibletoplantwhatseemstobealifelessstickandproduceatreeorotherkindsofplants.Thestickisreallywhatiscalledahardwoodcutting.Fromthesecuttings,trees,vines(藤蔓)exceptpinetreescangrow.Theyarecalledhardwoodbecausethepiecesarewoodyratherthanleafy.Gardenerscanexpectcloseto100percentsuccesswithplantssuchasgrape,gooseberry,privet,spiraeaandhoneysuckle.However,thismethoddoesnotworkwithapple,mapleoroaktrees,fortheylackleaves,hardwoodcuttingsarelessperishable(易腐烂的)thansoftwoodcuttings.Ifyouwanttodevelopagreenthumb—orgetreallygoodatgrowingplants—startyoureffortwithhardwoodcuttingsofwillow.Willowtreesoftenspreadfrombranchesthattakerootontopofthegroundthroughthewinter.Mostotherplantsdemandalittlemoreattention.Autumnisagoodtimetostarthardwoodcuttings.First,choosesomeshoots(新枝)thatgrewduringthemostrecentgrowingseason—theyoungestshoots.Cuttheshootstoalengthofabout15centimeters.Makesureyourememberwhichendwasup—theendthatisfartherfromtheroot.Expertsdothisbycuttingthebottomsoffdirectlyandthetopsatananglesotheyavoidmistakesduringplanting.Then,placethebottomofeachcuttingintosomewell－drained(排水良好的)soil.Ifyouhavetoplantinthespring,thecuttingsneedtobekeptcoolandwetthroughthewinter.Thetraditionalmethodistoplacethecuttingstogetherandburythemupsidedowninthesoil.Thisletsthebottomsofthecuttingsbefirsttofeelthewarmingeffectsofspringsunontheground.Putthecuttingsinaclosedplasticbag,putawetpapertowelaroundthebag,andthenputthewholethinginanotherplasticbag.1．Whatcanwelearnaboutwoodyplantsaccordingtothetext?A．Gardenerscanget100%successwiththem.B．Thecuttingsfromthemdryoutbeforerootsform.C．Allwon'tgrowfromhardwoodcuttings.D．They'refarlessreliablethanleafyplants.2．Whichofthefollowingfitsthemethodofhardwoodcuttingsproperly?A．Appletrees. B．Oaktrees.C．Pinetrees. D．Willowtrees.3．Whatisthefourthparagraphmainlyabout?A．Howtomakecuttings.B．Whentomakecuttings.C．Wheretoputcuttings.D．Whattomindatchoosing.4．Whatdoestheauthorstressaboutcuttingsinthelastparagraph?A．Thechoice. B．Thestorage.C．Thetemperature. D．Theseasons.BToday,Chinahasconducteditsfirst3Dprintingexperimentinspaceinanewlylaunchedspacecraft,whichwasputintolow－EarthorbitbyChina'sLongMarch5Bheavyliftcarrierrocket.VideobroadcastonCCTVshowedthattheprinterhasprintedaflatsectionofahoneyb－shaped(蜂巢状的)structureaswellasasymbolofChinaAerospaceScienceandTechnologyCorp,theparentpanyoftheChinaAcademyofSpaceTechnology.Theexperimentwasdonebya3Dprinter,developedandbuiltbyitsBeijingSpacecraftsManufacturingFactoryinsidetheprototypeofChina'snew－generationmannedspacecraft.Theprinter,namedtheSpace－BasedpositeMaterial3DPrintingSystem,usescarbonfiber－reinforcedmaterialstoautonomouslyprintobjects.Itisinstalledinthereentrymoduleoftheexperimentalspaceship,andwillbebroughtbacktoEarthoncethemodulereturns.Theprinterfeaturesadvancedtechnologiesinmaterialmodeling,precisioncontrolandautomation.Oncethespace－based3Dprintingtechnologybeesoperationallyready,itcanextensivelybenefitspaceprogramsasastronautscanuseittomanufacturealotofthingstheycurrentlyneedtoobtainfromresupplyflightsbycargospacecraft.WangYanan,editor－in－chiefoftheAerospaceKnowledgemagazine,saidthe3Dprinterwillbeveryusefulinextendedspacemissions,suchasthoseinaspacestation,becauseitwillallowastronautstomakeponentsquicklyandconvenientlyinspace.Thetechnologywillsavefuturespacejourneysconsiderableresourcesandcosts.Infact,thedeviceisnottheonlyrepresentativeof3Dprintingonboardtheprototype.ACubeSatdeployer,designedandmadethrough3DprintingbyCoSatsSpaceTechnology,isalsocarriedbythespacecrafttochecktheadaptabilityof3D－printedequipmentinspace.CoSatsChiefOperatingOfficerBaiRuixuesaidthe3D－printeddeployerismuchlighterandstrongerthanitscounterpartsanditwillhavehugepotentialinthespaceindustry.5．WhatdidthevideobroadcastonCCTVshowtotheaudience?A．Theprocessandtheproductsofthe3Dprinting.B．Thenameandtheshapeofthe3Dprinting.C．Thesignificanceofthe3Dprintingtechnology.D．Therelationshipbetweenthetwopanies.6．Whatifaponentisbrokeninthespacestationinthefuture?A．ItwillbesentbyspaceshipbacktoEarthforrepair.B．Theastronautscanfixitconvenientlybyhandonthespot.C．Theastronautscanmakeoneusing3Dprintingandreplaceit.D．Itwillbeunloadedandabandonedinspace.7．Whyisthelastparagraphmentioned?A．TointroducetheCubeSatdeployerproducedinspace.B．Toexplaintheadvantagesofthe3Dprintinginspace.C．Toshowtheadaptabilityof3Dprintinginspace.D．Toindicateabrightfutureof3Dprintinginspace.8．Whatcanbethemostsuitabletitleforthetext?A．3DPrintingExperimentConductedinSpaceB．3DPrintingSettoHelpEaseSpaceTripsC．3DPrintingLaunchedbyLongMarch5BD．3DPrinting—aNewWaytoExploreSpaceⅡ.七选五Allovertheworldpeoplearehookedonsports,whichhelpthemtostrengthentheirbodyandbuildtheircharacter.__1__Theyimprovetheparticipants'physicalskills,andprovideentertainmentfortheaudienceaswell.Manypeopleliketowatchothersplaygames.__2__Oftentheygetveryexcitedwhen“their”playerorteamwins.Iftheyarecrazyaboutthegameortheplayer,thenthey'llbeetheirdiehardfans.Somesportsaresointerestingthatpeopleeverywheregoinforthem.Football,forexample,hasspreadaroundtheworld.Swimmingispopularincountriesneartheseaorinthosewithmanyrivers.__3__Andthinkofpeopleincoldcountries.MassesofpeoplelovetoskateorskiinJapan,NorwayorCanada.__4__Chineseboxing,alsohasaverylonghistory.Butbasketballandvolleyballarerathernew,whichstartedinthelateofthenineteenthcentury.Peopleareinventingnewsportsorgamesallthetime.Waterskiing,asamoderngame,isoneofthenewestinthe