Ihaveadream高二英语课件
日期：2010-06-02 06:31
LanguagepointsUnit13FillintheblanksSeenfromthespace，theearthisan______planetWaterisveryimportanttolifeItissaidthatlifeontheplanetbeganinthe________Marinelifeis_______richLifeintheoceans_________fromthetiniest________________________uptogiantslike_______and_______Thewatermolecule_____________twohydrogenatomsandoneoxygenatomWaterexistsinthreestatesIthasarelativelyhigh_______pointSaltwaterhasa________freezingpointandis________thanfreshwaterTherearemany_____ofmarinelifeThereislifeevenonthe________ofthedeepestoceansThecreaturesontheoceanfloormanagetosurvivewithout________andget_________fromothersourcesoceanoceansincrediblyrangesallthewaysharkswhalesismadeupoffreezinglowerheavierspeciesbottomsunlightenergyDifficultandimportantsentences:1Lifeintheoceansrangesfromthetiniestplanktonallthewayuptogiantslikesharksandwhales2Thechemicalstructureofwatermakesitanexcellentmediumforlife3Thechemicalstructureofwateralsomakesitdi，
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