ondragstart="return false" onselectstart="return false" style="cursor:pointer;-moz-user-select: none;user-select:none;margin:0" oncontextmenu="return false"
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2014-01-07
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英语
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高中英语 MODULE1 Deep South背景知识拓展 外研版选修8
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AntarcticaTheAntarcticcontinentislocatedintheSouthPoleofourplanet.Itsgeography,climateandbiologicalconditionsprovideauniqueenvironment.Antarcticahasthelowesttemperaturesinourplanetreaching70°Celsiusbelowzerowithwindsof300kmperhour,containing90%oftheicewhichisthemajorreserveoffreshwateronEarth.About99%ofAntarcticaiscoveredwithiceatanaveragethicknessof2,500meters,reachinginsomeplacesasdeepas4,776meters.Iftheicelayerwouldmelt,alltheEarth’sOceanswouldrise70metersabovetheactuallevel.TheAntarcticContinentfunctionsasoneofEarth’s“refrigerators”regulatingtheoceaniccurrentsandtheworld’sclimate.Anysignificantenvironmentalimpactwouldaltertheglobalpatte