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1、『阅读理解【1】：波浪』.Wavesarebeautifultolookat,buttheycandestroyshipsatsea,aswellashousesandbuildingsneartheshore.Whatcauseswaves?Mostwavesarecausedbywindsblowingoverthesurfaceofthewater.Thesunheatstheearth,causingtheairtoriseandthewindstoblow.Thewindsblowacrossthesea,pushinglittlewavesint
2、obiggerandbiggerones.Thesizeofawavedependsonhowstrongthewindis,howlongitblows,andhowlargethebodyofwateris.Inasmallbaybigwaveswillneverbuildup.Butatseathewindcanbuildupgiant,powerfulwaves.Arulesaysthattheheightofawave(inmeters)willusuallybenomorethanone-tenthofthewind’sspeed(inkilom
3、eters).Inotherwords,whenthewindisblowingat120kilometersperhour,mostwaveswillbeabouttwelvemiters.Ofcourse,somewavesmaycombinetoformgiantwavesthataremuchhigher.In1933theUnitedStatesNavyreportedthelargestmeasuredwaveinhistory.ItroseinthePacificOceantoaheightofthirty-fourmeters.1._____
4、_cause(s)waves.A.ThesunB.TheearthC.TheairD.Thewinds2.Thesizeofawavedependson________factors.A.oneB.threeC.twoD.four3.Bigwaveswillbuildup_____.A.neartheshoreB.overthesurfaceofwaterC.inasmallbayD.atsea4.Asarule,theheightofawaveis_____one-tenthofthewave’sspeed.A.nomorethanB.morethanC.
5、nolessthanD.lessthan注释：1.giantn.巨人,大力士,巨大的动物或植物,伟人,天才adj.庞大的,巨大的Shakespeareisagiantamongwriters.莎士比亚是一位文坛巨匠。2.nomorethanadv.只是morethanenough太多,够多,十二分lessthan小于,决不nolessthanconj.正如答案：1:D2:B3:D4:A阅读理解【2】：树与环境』Duringitsgrowth,alargetreetakesinbymeansofitsrootsmanytonsofwater.Yetthetre
6、eretainsonlyaverylittleofthiswater,perhaps1%,inthegrowthprocessofthecells.Therestisgivenoffthroughitsleavesintotheatmosphere.Thesequantitiesaresignificant.Evenasmalltree,suchasafruit-tree,givesofffourgallonsofwaterintotheaireveryhour.Anoaktree,withperhapsaquarterofamillionleaves,gi
7、vesoffmorethanathousandgallonsadayinsummertime.Whenwethinkofawholeforest,thetotalmustclearlybevast,eventhoughtheamountsvaryaccordingtothekindoftree.Atreecanbeseenasakindofpumpwithtwopurposes.Itisalwayssuckingupwaterfromtheground,whichwouldotherwisebecomefarmorelooselycomposed.Atthe
8、sametime,itincreasesthehum
