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【题目】近年来西藏纳木错面积不断增大,完成下列各题。

【1】近年来纳木错面积增大的主要原因是

A.地壳下陷,湖区积水增多 B.退耕还湖,生态系统改善

C.气候变暖,冰川融水增多 D.蒸发减弱,水汽向外输送减少

【2】纳木错面积增大可能会带来

A.湖水蒸发量减小 B.湖水盐分含量增大

C.湖泊流出水量增大 D.湖区生物多样性增多

【答案】

【1】C

【2】D

【解析】

试题分析:

【1】近年来纳木错面积增大的主要原因是气候变暖,冰川融水增多,C对。地壳下陷,湖区积水增多,水体深,不是面积增大,A错。湖区是草原牧区,没有耕地,,B错。全球变暖,气温升高,蒸发,水汽向外输送增加,D错。

【2】纳木错面积增大,水体增大,可能会带来湖区生物多样性增多,D对。面积大,湖水蒸发量增加,A错。水体增大,湖水盐分含量减小,B错。湖泊面积增大,应是水量增大,C错。

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