- 問題詳情:Adamisaman-madestructurebuiltacrossariver.Mostdamsarebuilttocontrolariver’swaterflow,improvenavigationandcontrolflooding.However,somedamsarebuilttoproducehydro-electricpower.Hydro-electricpowerisproducedaswaterpassesthroughadam,andintoariver...
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