many people have wondered what makes the oceans阅读理解答案

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1、Manypeoplehavewonderedwhatmakestheoceans阅读理解答案　　Manypeoplehavewonderedwhatmakestheoceansriseandfallontheword’sbeachestwiceaday.ThosetidesarecausedbytheforceoftheMoon’sgravityandtherotation(自转)oftheEarth.Gravityactsonthecenterofanysolidobject.TheEarthismostlymolten(熔化的)

2、rock,butcomparedtotheoceans,wecanthinkofitasasolidobject.　　Asyouknow,theoceansarefluidandlieonthesurfaceoftheEarth.WhentheMoonisoverhead,theoceansarefourthousandmilesclosertotheMoonthantheEarth’scenteris.Becausetheoceansarecloser,theMoonpullsharderonthewaterthanontheEa

3、rth.Thisstrongerpullmakesthewaterbunchup(集中)alittleundertheMoon,creatingahightide.　　Atthesametime,theoceansontheoppositesideoftheEartharefourthousandmilesfartherfromtheMoonthantheEarth’scenteris.TheMoon’spullonthiswaterisweak.Thiswaterbunchesupbecauseitis“leftbehind”(m

4、akinganotherhightide)astheEarthispulledslightlytowardstheMoon.　　WhenthewatersbunchuponthesetwosidesoftheEarth,theydrawwaterawayfromtheothersidesoftheEarth,whichcreatesthelowtides.　　AstheEarthrotates,differentpartsofthelandandoceanspassthroughthehigh-tideandlow-tidezone

5、s.Andthatmakesthewatersonourcoastsgoupanddown.　　33.Accordingtothepassage,therewouldbenotidesiftherewereno______.　　rotation　　fromtheEarth　　C.gravityfromtheMoon　　D.Moon’sgravityorEarthrotation　　34.Themoon’spullhasaweakeffectontheoceansontheoppositeoftheEarth,.　　A.sothere

6、isalowtide.　　B.sothewatertheredoesn’tbunchup　　C.butitcanstillmakeahightide.　　D.becausetheEarth’sgravitythereisgreater.　　35.Whichofthefollowingfactscanbeinferredfromthepassage?.　　A.Low-tidezonesareneartohigh-tidezones.　　B.TheoceansoftheEarthareawholebody.　　C.High-tidezo

7、nesareseparatedfromlow-tidezones.　　Earth’ssurfaceis4000milesawayfromtheMoon.　　DCB