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【阅读理解,阅读下面四篇材料,根据其内容,选择正确答案或完成阅读任务。Oneofthemostinterestingprojectsinoceanography(海洋学)istheworkofmappingtheoceanfloor.Onlyaverysmallpartofi】
更新时间:2024-04-20 00:22:38
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问题描述:

阅读理解,阅读下面四篇材料,根据其内容,选择正确答案或完成阅读任务。

Oneofthemostinterestingprojectsinoceanography(海洋学)istheworkofmappingtheoceanfloor.Onlyaverysmallpartofithasbeenmapped.Thiswasnotimportantwhenonlysurfaceshipssailedtheworld’soceansbutitcanmeanthedifferencebetweenlifeanddeathtomeninsubmarines(潜艇).

Longagotherewasonlyonewaytofindouthowdeeptheoceanwas.Aseamancouldthrowaweightedropeoverthesideofhisship.Thenhepulledtheropeupafterithadreachedthebottom.Butthiswasnotaveryexactwayofmeasuring.

Inthetwelfthcenturyabetterwaywasfound.Soundwasusedtomeasuretheocean.AnAmericanNavyshipsailedtheoceantomakeanexperiment.Seamendroppedanumberofdevicesthatwouldgiveoutaloudnoisewhentheyhitthebottom.Andadevicehadbeeninventedmeasuredthetimeittookforthesoundtoreachtheship.Ithelpedoceanographermaptheoceanfloor.

Underwaterphotographyisalsoimportantinmappingpartsoftheoceanfloor.Withthenewmethodsthathavebeenperfectedcamerascantakepicturesoftheunderwatervalleysevenincolor.

1.Mappingtheoceanflooristhemostimportanttopeople__ .

A.onships B.inboats C.inthesea D.insubmarines

2.Whichwaywasusedtomeasurethedepthoftheoceaninthepast?

A.Usingaweightedrope B.Usingaseaman

C.Usingaboat D.Usingsound

3.Whatdidtheseamenusewhentheydidtheexperiment?

A.Stones B.Instruments C.Devices D.Ropes

4.Wecanknowfromthelastparagraphthat_.

A.cameraistheonlyperfectwayofmappingtheoceanfloor.

B.camerawilltaketheplaceofanyotherinstrument.

C.cameracanmapanypartoftheoceanfloor.

D.cameraisoneofthenewwaystomaptheoceanfloor.

5.Howmanywayshavebeenusedtomaptheoceanfloor?

A.Two B.Three C.Four D.F

刘兴良回答:
  1D 2A 3C 4D 5B
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