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[单选题]
我国目前已经成为世界上受荒漠化危害最严重的国家之一，造成我国荒漠化日益严重的人为因素是（ ） ①缺水区用水不当，河道干涸 ②风蚀、水蚀和沼泽化 ③过度垦殖和过度放牧 ④常年受副热带高气压带控制
A
①④
B
①③④
C
①③
D
③④
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参考答案
试题答案：
C
答案解释：
【考情点拨】本题考查了我国西北地区荒漠化产生的原因等知识点。 【应试指导】当前我国沙漠化日益严重，这与人类活动有密切关系，其主要人为因素有过度垦殖和过度放牧，植被遭到严重破坏。另外，在干旱和半干旱地区，水资源的不合理利用，也会导致环境条件恶化。
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我国目前已经成为世界上受荒漠化危害最严重的国家之一，造成我国荒漠化日益严重的人为因素是（ ） ①缺水区用水不当，河道干涸②风蚀、水蚀和沼泽化③过度垦殖和过度放牧④常年受副热带高气压带控制
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