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时间:2018-08-03
《阅读理解训练题-74》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、阅读理解训练题(七十四)A Beforeanewairlinergoesintoservice,everypartofitistestedagainandagain.Buttherearetwoteststhataremoreimportantthanalltheothers.Inthefirsttest,amodernairlinermustflyatveryhighaltitudes.Airmustbepumpedintotheplacesothatthepassengerscanbreathe.Themetalstructureofthepla
2、nehastobeverystrongforthisreason.Whentheplaneisfilledwithair,theairpressesagainsttheskinoftheplaneinside.Thepressureonasmallwindow,forexample,islikeahugefootthatistryingtogetout.Ifasmallpartoftheplaneweretocrack(爆裂),theplanewouldexplodeinthesky.Inordertotestthestructureoftheplan
3、e,itisloweredintoahugetankofwater.Thenitisfilledwithair.Thepressureinsidetheplaneisgreaterthaniteverwillbewhenitisintheair.Finally,thereisanexplosion.Engineerscandiscoverwhichpartoftheplanehascracked. Inthesecondtest,thetestpilotmustfindexactlywhathappenswhenalltheenginesareshu
4、toffatonce.Hetakestheplaneupveryhigh.Thenheshutstheenginesoff,theplanebeginstofalllikeastone.itisthepilot’sjobtofindouthowhecangetcontroloftheplaneagain.Thesetwotestsareexamplesofhowplanesaremadesafebeforetheyevercarrypassengers. 56.Whymustairbepumpedintotheplane? A.Becausewit
5、houtairtheplanecan’tfly. B.Becausetheplaneneedsairforitsrefueling. C.Becausethepassengers’livesdependonair. D.Becausethepassengershavepaidforit. 57.Whatwouldhappenifasmallpartoftheplanewascracked? A.Theplanewouldnotgoforward. B.Theplanewouldexplode. C.Theplanewouldfalldow
6、n. D.Theplanewouldflyslowly. 58.Forwhatpurposedoesthepilotshutoffalltheengines? A.Tofindoutexactlywhathappens. B.Tosavefuel. C.Toflyevenmoreslowly D.Tokeepbalance(平衡)B RobertSpring,a19thcenturyforger(造者),wassogoodathisprofessionthathewasabletomakehislivingfor15yearsbysell
7、ingfalsesignaturesofAmericans.SpringwasborninEnglishin1813andarrivedinPhiladelphiain1858toopenabookstore.AtfirsthebecamerichbysellinghissmallbutrealcollectionofearlyU.S.autographs(手稿).Discoveringhisabilityatcopyinghandwriting,hebeganimitatingsignaturesofGeorgeWashingtonandBenFra
8、nklinandwritingthemonthetitlepagesofoldbocks.To
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