欢迎来到文章屋！
themainmirroroftheHubble______
A.hadproblemsB.wasdistantC.wastheclearestD.requiresrepairs
请参考一下课文：
TheHubbletelescopewaslaunchedintospacebyNASAonApril20,1990atacostofoverabilliondollars.RightfromthestarttherewastroublewiththeHubble.Thepicturesitsentuswereverydisappointingbecauseitsmainmirrorwasfaulty!NASAisnowgoingtoputthetelescoperight,soitwillsoonbesendingupfourastronautstorepairit.TheshuttleEndeavourwillbetakingtheastronautstotheHubble.Arobot-armfromtheEndeavourwillgrabthetelescopeandholditwhiletheastronautsmakethenecessaryrepairs.Ofcourse,theHubbleisabovetheearth'satmosphere,soitwillsoonbesendingustheclearestpicturesofthestarsanddistantgalaxiesthatwehaveeverseen.TheHubblewilltellusagreatdealabouttheageandsizeoftheuniverse.Bythetimeyoureadthis,theHubble'seagleeyewillhavesentusthousandsandthousandsofwonderfulpictures.
我选的是A,为什么?
邮箱：
，本站将在三个工作日内删除。