being an astronaut sounds cool, doesn’t it in space阅读理解答案

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1、BEINGanastronautsoundscool,doesn’titInspace阅读理解答案　　D　　BEINGanastronautsoundscool,doesn’titInspace,theygettodosomeprettyamazingthings,likefloating(漂浮)inzerogravity(重力).　　However,therearealsoplentyofthingsthatastronautscan’tdobecauseoftheirweightlessenvironment,a

2、ndthat’sverysad.What’sworse,theycan’tevenlettheirsadnessshow,becauseit’simpossibletocryinzerogravity.　　Ofcourse,astronautscanstillproducetears(眼泪).Butcryingismuchmoredifficultinspace,accordingtoTheAtlantic(大西洋月刊)inJanuary.Withoutgravity,tearsdon’tflow(流动)downou

3、toftheeyesliketheydohereonEarth.Thismeansthatwhenyoucryinspace,yourtearshavenowheretogo—theyjuststick(粘)toyoureyes.　　InMay2011,astronautAndrewFeustelexperiencedthisduringoneofhisspacewalks.“Tears,”hesaid,“don’tfalloffofyoureyes.Theyjuststaythere.”　　Besidesmakin

4、gyourvision(视线)unclear,thiscanalsocausephysicalpain.BackonEarth,tearsaresupposedtobringcomforttotheeyes.Butthat’snotthecase(情况)inspace.Thespaceenvironmentdriesoutastronauts’eyes,andwhentearssuddenlywettheeyes,itcancausepainratherthancomfort.“Myrighteyeisstingin

5、g(刺痛)likecrazy,”Feusteltoldhisteammateduringthewalk.　　Sincegravitydoesn’tworkinspace,astronautsneedsomeextrahelptogetridof(除去)thetears.Feustelchosetorubhiseyesagainsthishelmettowipe(擦)thetearsaway.Anotherchoiceistojustwait—“Whenthetearsgetbigenough,theysimplybr

6、eakfreeoftheeyesandfloataround,”astronautRonParisetoldTheAtlantic.　　Therearelotsofsmallthings—thingslikecrying—thatwearesousedtoonEarth.Weusuallytakethemforgranteduntiltheybecomeaprobleminatotallydifferentenvironment,likespace.There,astronautscan’ttalktoeachoth

7、erdirectly.Theyalsocan’teatordrinkinnormalways.Theycan’tevenburp(打嗝),becausethereisnogravitytoholdthefooddownintheirstomach.Iftheydoburp,theyjustendupthrowingup(呕吐)everythingintheirstomach,accordingtotheUKNationalSpaceCenter.　　Therefore,perhapsit’sonlyspaceexpl

8、orerswhocanhonestlysay,“Gravity,you’rethebest.”　　56.FromParagraphs2and3,wecanknowthat__________.　　A.astronautsareunabletofeelsadinspace　　B.astronautsproducefewertearsinspace