甘肃省民勤县地处河西走廊东北部,石羊河流经民勤盆地。新中国成

甘肃省民勤县地处河西走廊东北部,石羊河流经民勤盆地。新中国成立以来其上游地区修建许多水库,几乎拉截全部河水。随着人口增长、耕地扩大,民勤县地表水骤减,地下水位急剧下降,导致胡杨、沙枣林等植被大面积死亡。肆虐的风沙,荒废的田园,让民勤人深刻意识到,“决不能富一阵子,后悔一辈子”。读图回答下列各题。

民勤绿洲面临消失的主要人为原因是

A.过度用水      B.沙漠广布      C.过度放牧        D.气候干旱

综合治理和保护民勤环境的合理措施有

①放弃全部耕地     ②合理调水    ③加强能源建设    ④恢复自然植被

A.①②       B.②③          C.①④           D.②④

答案

【小题1】A

【小题1】D


解析:

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