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阅读理解:Beforeanewtypeofairplanegoesintoservice,everypartofitistestedagainandagain.Buttherearetwoteststhataremoreimportantthanalltheothers.Thefirstiscalledthe“tanktest”
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更新时间:2024-03-29
问题描述:

阅读理解:

Beforeanewtypeofairplanegoesintoservice,everypartofitistestedagainandagain.Buttherearetwoteststhataremoreimportantthanalltheothers.

Thefirstiscalledthe“tanktest”.Amodernairplanemustflyveryhighinthesky.Airmustbepumpedintotheplanesothatthepassengerscanbreathe.Themetalstructureoftheplanehastobeverystrongforthisreason.Whentheplaneisfilledwithair,theairpressesagainsttheskinoftheplaneinside.Thepressureonasmallwindowislikeahugefootthatistryingtogetout.Ifasmallpartoftheplaneweretofail,theplanewouldexplodeinthesky.Totestthestructureoftheplane,theplaneisloweredintoahugetankorcontainerofwater.Thenitisfilledwithair.Thepressureinsidetheplaneisgreaterthaniteverwillbewhenitishighupintheair.Finally,thereisanexplosion.Thisdoesnotcausesomuchdamageinsidethewatertankasitwouldanywhereelse.Engineerscandiscoverwhichpartoftheplanehasbroken.Thenthatpartismadestronger.

Themostdangeroustesthappenswhenthenewplaneisgoingthroughtestflightsintheair.Thetestpilotmustfindoutexactlywhathappenswhentheenginesareallshutoffatonce.Theplanebeginstofalllikeastone.Itisthepilot'sjobtofindouthowhecangetcontroloftheplaneagain.Thesetwotestsareexamplesofhowplanesaremadesafebeforetheyevercarrypassengers.

1.Bydoingthe“tanktest”,theengineerscanfindout________.

[]

A.theamountofairintheplane

B.thestrengthoftheplanestructure

C.thepressureinsideandoutsidetheplane

D.thepoweroftheairplaneengines

2.Whatwillhappentotheplaneunderthe“tanktest”?

[]

A.Itwillbebroken.

B.Itwillbemadestronger.

C.Itwillbefilledwithwater.

D.Itwillbetestedbypilots.

3.Accordingtothetext,whyaretestflightsmostdangerous?

[]

A.Theplanemayexplodeintheair.

B.Thepilotmaylosecontroloftheplane.

C.Theenginesmaybedamaged.

D.Toomuchairmaygetintotheplane.

4.Whatmightbethemostsuitabletitleforthetext?

[]

A.TwoImportantTestsonAirplanes

B.TheImportanceofFlyingSafely

C.TheDangerofTestingAirplanes

D.HowAirplanesAreMadeandTested

李向新回答:
  B;A;B;A
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