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　　【Sincepeoplefirstsentrocketsintospaceinthe1950swehavebeenleavingbehindallsortsofthings.Someofthemlikethecamerawerelostbyastronautswhiletheydidworkoutsidetheirspaceship.Butmuchofthespacejunkismade】

　　Sincepeoplefirstsentrocketsintospaceinthe1950swehavebeenleavingbehindallsortsofthings.Someofthemlikethecamerawerelostbyastronautswhiletheydidworkoutsidetheirspaceship.Butmuchofthespacejunkismadeupoflittlepiecesofthingsthatwereoncebiggerobjectsuntiltheystruckeachotherandbrokeapart.

　　Somethingswesendintospacefallbacktowardtheearthandburnupintheatmosphere.Butlargerpiecessometimessurvivetheextremeheatandhitthegroundortheoceanatgreatspeeds.Sothereisalwaysconcernthatsomethingmayfallfromtheskyanddosomeharm.

　　Butspacejunkfallingonhousetops(屋顶)isnotthebiggestworry.Scientistsareconcernedaboutwhathappenswhenanemptyrocketstrikesanotherwhileorbiting(绕轨道飞行)theearth.Twobigthingsbecomemanysmallerthings.Theythenhitotherthings.Thepiecesgetsmallerandsmalleruntiltheyformacloudofjunkthatblocksthepathoffuturespacevehicles.

　　Sowhatcanbedonetocleanupthespacearoundourplanet?MarcoCastronuovoanItalianresearchertalksaboutsendingasatelliteintospacethatwouldgetveryclosetosomeofthelargerpiecesofspacejunk.Thesatellitewouldconnectasmallrockettotheuselessobject.Whentherocketexplodesitpushesthejunkintoalowerandslowerorbitnearertheearth.Afteratimethejunkburnsupintheatmosphere.

　　Mr.Castronuovohasproposed(提议)usinganumberofsmallsatelliteswithroboticarms.Onearmwouldcatchthespacejunkandanotherarmwouldconnecttherocket.Heimaginesthateachsatellitewouldjumpfromonelargepieceofjunktoanother.Hethinksthismethodcoulddestroyabouttenlargeobjectseachyear.

　　Scientistshavebeenconcernedaboutspacejunkformanyyears.Rightnowthecostsoftheclean-uphavebeentoogreat.Mr.Castronuovosayshissystemcouldbeputinplaceforamuchmorereasonableamountofmoney.

　　小题1:Muchofthespacejunk_____.A．wasthrownbytheastronautsB．isfrombrokenspaceshipC．ismadeupofsmallpiecesofthingsD．returnstotheearthpiecebypiece小题2:Scientistsaremostworriedthatthespacejunk_____.A．willstopthefuturespacevehicles

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2020-04-0919:26

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唐海

　　小题1:C小题2:A小题3:B

　　分析：

　　文章介绍太空垃圾的形成原因和对太空造成的危害，及如何解决此类问题。小题1:细节题：从第一段的句子：Butmuchofthespacejunkismadeupoflittlepiecesofthingsthatwereoncebiggerobjectsuntiltheystruckeachotherandbrokeapart.可知大多数的太空垃圾是由小的东西组成的，选C小题2:细节题：从第三段的句子：Thepiecesgetsmallerandsmalleruntiltheyformacloudofjunkthatblocksthepathoffuturespacevehicles.可知科学家担心太空垃圾会阻挡太空飞行器的路，选A小题3:推理题：从最后一段的句子：Mr.Castronuovosayshissystemcouldbeputinplaceforamuchmorereasonableamountofmoney.可知Mr.Castronuovo认为他的系统会节约很多钱，答案是B

　　点评：

　　文章介绍太空垃圾的形成原因和对太空造成的危害，及如何解决此类问题。文章难度适中，但题目要我们理解有些重点的句子。集中考查了句意理解题和细节题，要求考生有较强的细节理解能力。做题时也可以结合自己的生活常识和经验，再通过逻辑推理和判断。