近年来,塔里木河中下游的胡杨林大量死亡,其原因(    )A.胡杨林

近年来,塔里木河中下游的胡杨林大量死亡,其原因(    )

  A.胡杨林树种退化,不适于日益干旱的环境

  B.海洋输送水汽数量比往年少

  C.塔里木河上中游引水灌溉增加,输送到下游的水量锐减

  D.年平均气温降低,冰川融水减少

答案

C

  解析:新疆近年来的气候并没有太大的变化。随着塔里木河上中游用水量的增加,塔里木河下游的水量减少,甚至断流。

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