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1、::::单元检测卷（三十二）选修7Unit2::::I.阅读理解EnteringSpace,astronautscangiveusafascinatingaccountofashuttleflight,describingthepressureofacountdownandlaunch,thecomplexitiesoflivingthedaysinthestrangeweightlessenvironment,thechallengesofworkinginspace,theemotionaleffectofseeingearthf
2、romspace,thedramaofthemeteoriclanding.However,therearealsoplentyofthingsthatastronautscadtdobecauseoftheirweightlessenvironment,andthat'sverysad.What'smore,theycan'tevenlettheirsadnessshow,becauseifsimpossibletocryinzerogravity.Ofcourse,astronautscanstillproducetears•Bu
3、tcryingismuchmoredifficultinspace,reportedTheAtlanticinJanuary.Withoutgravity,tearsdonftflowdownwardoutoftheeyesliketheydohereonEarth・Thismeansthatwhenyoucryinspace,yourtearshavenowheretogo—theyjuststicktoyoureyes・InMay2011，astronautAndrewFcustclexperiencedthisduringone
4、ofhisspacewalks.“Tears，”hesaid,“don'tfalloffofyoureye…Theyjustkindofstaythere.vBesidesmakingyourvisionunclear,thiscanalsocausephysicalpain.BackonEarthstearsaresupposedtobringcomforttotheeyes.Butthat'snotthecaseinspace・Thespaceenvironmentdriesoutastronauts1eyes,andwhente
5、arssuddenlywettheeyes,itcancausepainratherthancomfort.“Myrighteyeispainfullikecrazy,”Feusteltoldhisteammateduringthewalk.Sincegravitydoesn'tworkinspace,astronautsneedsomeextrahelptogetridofthetears.Feustelchosetorubhiseyesagainsthishelmettowipethetearsaway.Anotherchoice
6、istojustwait一“Whenthetearsgetbigenoughtheysimplybreakfreeoftheeyeandfloataround,”astronautRonParisetoldTheAtlantic.Therearelotsofsmallthings—thingslikecrying—thatwearesousedtoonEarth・Weusuallytakethemforgranted,untiltheybecomeaprobleminatotallydifferentenvironment,likes
7、pace・There,astronautscanrttalktoeachotherdirectly.Theyalsocanteatordrinkinnormalways・Theycantevenburp（打嗝），becausethereisnogravitytoholdthefooddownintheirstomach.Iftheydoburp,theyjustendupthrowingup（呕I止）everythingintheirstomach,accordingtotheUKNationalSpaceCenter.Thus,pe
8、rhapsitsonlyspaceexplorerswhocanhonestlysay,“Gravity,you'rethebest.”语篇导读在太空失重环境下，宇航员的生活和在地球上千差万别：流泪时泪水挂在眼珠上，不仅
