Nowadaysmoreandmorepeoplecareabouttheexploitation(开采)of...
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问题详情:Nowadaysmoreandmorepeoplecareabouttheexploitation(开采)ofthenaturalresources,suchasoil.Thoughthere'remanykindsofresources,withthefastincreaseofpopulationandtheappearanceofmanymorefactories,th...