下学期Unit13高二英语课件
日期：2010-11-10 11:06
butestuariesareprotectedfromwavesandstormsbyislands，animalscanenjoyallthebenefitsoftheoceanswithouthavingtofacemanyofitsdangersTidesprovideenergyfortheecosystems，Unit13IntegratingSkillsoHowmuchdoyouknowaboutthem?Istheeconomytherewell-developedornot?Whichcityisthemostdeveloped?Why?Canyoutellwhatmapitis?Whereisit?Isthewaterheresaltyorfresh?What’stheplacewhereriverandtheoceanmeet?FindthedefinitionofanestuaryAnestuaryisthebodyofwaterwherearivermeetstheoceanSaltwaterfromtheoceanandfreshwaterfromtherivermixtogetherinanestuaryThismixingoffreshandsaltwatercreatesauniqueenvironmentfilledwithlifeofallkinds－azonebetweenthelandandseaReading:Questions(1)Whyareestuariessuchgoodplacesfornature’syoungone?(2)Whatdoesdensitymeaninthispassage?(3)Howdoestuariesaffectthewaterthatpassesthroughthem?(4)Whyareestuariesmoresensitivetopollutionthanotherareas?(5)Whyareestuariesimportanttohumanbeings?1Whyareestuariessuchgoodplacesfornature’syoungones?Inestuaries，mudorsa，
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