英语阅读理解题阅读理解题InmanystoriesonTVandinscience-fictionbooks,mentraveltofarawaystars.Theyhavequick,easyjourneys.Butsofar,menhavebeenabletoreachonlytheearth’sownmoon.Supposeamanwantedtoreacha

　　英语阅读理解题

　　阅读理解题

　　InmanystoriesonTVandinscience-fictionbooks,mentraveltofarawaystars.Theyhavequick,easyjourneys.Butsofar,menhavebeenabletoreachonlytheearth’sownmoon.

　　Supposeamanwantedtoreachadistantstar.Evenifhetraveledhiswholelife,hewouldhavetomovefasterthanthespeedofthelight.Nothingcanmovethatfastexceptlightitself.

　　Strangethingshappentoanobjectwhenitmovesrapidly.Theobjectweighsmore.Anobjectmovingat86percentofthespeedoflightistwiceasheavyasitisatrest.Astickappearsshorter.Aclockrunsmoreslowly.Amanwouldnotagesofastashewouldontheearth.

　　Lighttravelsmorethan186,000milesasecond,orabout11millionmilesaminute.Inoneyear,lighttravelssixtrillionmiles.Thatgreatdistanceiscalledalight-year.Itisusedtomeasuredistanceinspace.

　　ThestarclosesttooursunisAlphaCentauri.Itismorethanfourlight-yearsaway.Ifonetraveledatthespeedoflight,hecouldmakearoundtriptoAlphaCentauriinnineyears.But,evenatthatspeed,hecouldnotreachAlcaid(北斗星)inthehandleoftheBigDipper.Aone-wayjourneytoAlcaidwouldtakealmost200years

　　1．阅读理解(4.0)分

　　Inthispassagethewords“closesttooursun”meansthestar_________.

　　A、theearthweliveon

　　B、AlphaCentauri

　　C、theBigDipper

　　D、themoon

　　2．阅读理解(4.0)分

　　Aone-wayjourneytoAlcaidwouldtake_________.

　　A、aboutnineyears

　　B、lessthanfouryears

　　C、almost200years

　　D、lessthan100years

　　3．阅读理解(4.0)分

　　Whydowemeasurethedistanceinlight-yearsinsteadofmiles?

　　A、Unitsoflight-yearssoundbetter.

　　B、Usinglight-yearsreducedthenumberoffiguresused.

　　C、Weusedtomeasuredistanceinlight-yearslongago.

　　D、Wedonotmakemistakeswhenweuselight-years.

　　4．阅读理解(4.0)分

　　Ifastonemovedatthespeedoflight,it_________.

　　A、wouldweightwicemorethanitismotionless

　　B、wouldweighasmuchasitisonearth

　　C、wouldweighlessthanitisonearth

　　D、wouldnothaveweightatall

　　5．阅读理解(4.0)分

　　Thisstoryismainlyabout