英语精读3作业2.doc

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1、__________________________________________________阅读理解题第1题(20)分InmanystoriesonTVandinscience-fictionbooks,mentraveltofarawaystars.Theyhavequick,easyjourneys.Butsofar,menhavebeenabletoreachonlytheearth’sownmoon.Supposeamanwantedtoreachadistantstar.Evenifhetravel

2、edhiswholelife,hewouldhavetomovefasterthanthespeedofthelight.Nothingcanmovethatfastexceptlightitself.Strangethingshappentoanobjectwhenitmovesrapidly.Theobjectweighsmore.Anobjectmovingat86percentofthespeedoflightistwiceasheavyasitisatrest.Astickappearsshorter.Ac

3、lockrunsmoreslowly.Amanwouldnotagesofastashewouldontheearth.Lighttravelsmorethan186,000milesasecond,orabout11millionmilesaminute.Inoneyear,lighttravelssixtrillionmiles.Thatgreatdistanceiscalledalight-year.Itisusedtomeasuredistanceinspace.Thestarclosesttooursuni

4、sAlphaCentauri.Itismorethanfourlight-yearsaway.Ifonetraveledatthespeedoflight,hecouldmakearoundtriptoAlphaCentauriinnineyears.But,evenatthatspeed,hecouldnotreachAlcaid(北斗星)inthehandleoftheBigDipper.Aone-wayjourneytoAlcaidwouldtakealmost200years.1．阅读理解(4.0)分Inth

5、ispassagethewords“closesttooursun”meansthestar__B_______.A、theearthweliveonB、AlphaCentauriC、theBigDipperD、themoon2．阅读理解(4.0)分Aone-wayjourneytoAlcaidwouldtake______C___.A、aboutnineyearsB、lessthanfouryearsC、almost200yearsD、lessthan100years3．阅读理解(4.0)分Whydowemeasu

6、rethedistanceinlight-yearsinsteadofmiles?B收集于网络，如有侵权请联系管理员删除__________________________________________________A、Unitsoflight-yearssoundbetter.B、Usinglight-yearsreducedthenumberoffiguresused.C、Weusedtomeasuredistanceinlight-yearslongago.D、Wedonotmakemistakeswhen

7、weｕｓｅlight-years.4．阅读理解(4.0)分Ifastonemovedatthespeedoflight,it_____A____.A、wouldweightwicemorethanitismotionlessB、wouldweighasmuchasitisonearthC、wouldweighlessthanitisonearthD、wouldnothaveweightatall5．阅读理解(4.0)分Thisstoryismainlyabout___B______.A、thedistancebetw

8、eenthesunａｎｄtheotherstarsB、theproblemsoftravelingtofarawaystarsC、whathappenswhenwetravelfasterthanthespeedoflightD、thetoolweｕｓｅwhenwegotofarawaystars第2题(20)分Ifthereisanysing