阅读理解。Asweallknowtheoceanmoves.Butwaves(波浪)breakingonthebeachmaketheoceanfun.Whenyoustandontheshore(海岸)andlookatthewavesitseemslikethewaterisrolling(翻滚)intowardyou.Butthew
阅读理解。
Asweallknowtheoceanmoves.Butwaves(波浪)breakingonthebeachmaketheoceanfun.When
youstandontheshore(海岸)andlookatthewavesitseemslikethewaterisrolling(翻滚)intowardyou.
Butthewaterisnotreallymovingforward.Whatyouseemovingiswaveenergy.Andwaveenergycomes
fromthewind.
Let'sthinkabouthowthisworks.Aswaveenergypassesthroughthewatertheenergymakesparticles
(粒子)ofwatermoveupanddown.Justgiveyouanexampleofawavepassingunderabasketball.Weput
abasketballonthesea.Whenthewindblowsawavecomesfrombehindthebasketball.Thebasketball
movesuptothetopwiththewave.Thenthewavecontinuesandleavesthebasketballbehind.Thebasketball
lookslowerbutitdoesn'tmoveforward.That'sbecausethewaveenergymovesthewaterthatisunderthe
basketballupanddownasitpasses.
Sowhycanyouseeawaveknockyoudownontheshore?Whenawavemovestowardtheshorethe
bottom(底部)ofthewaveslowsdownbecauseitmeetstheoceanfloor.Butthetopwhichiscalledcrest
keepsmoving.Thedifferentactioncausesthewavetofalloverorbreakontotheshore.Ifawaveisvery
largeitcarriesalotofenergywhenithitstheland.Astimegoesbywavescanbreakupandcarryaway
therocksandotherthingsontheshore.Shorelinesarechangingallthetimebecauseofwaveaction.
1.______isreallymovingforwardwhenyoulookatthewaves.
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A.Water
B.Waveenergy
C.Waterandwaveenergy
2.Match(与……相匹配)thesentenceswiththepicturesandchoosetherightanswer.
(1)Thebasketballmovesuptothetopwiththewave.
(2)Thewavecontinuesandleavesthebasketballbehind.
(3)Whenthewindblowsawavecomesfrombehindthebasketball.
a b c
A.a-(2)
b-(1)
c-(3)
B.a-(3)
b-(2)
c-(1)
C.a-(3)
b-(1)
c-(2)
3.Theunderlinedword"crest"inthepassagemeans" "inChinese.
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