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【题目】按目前的融化速度,喜马拉雅冰川在2035年之前消失的可能性非常大。据此完成下列问题。

【1】造成喜马拉雅地区冰川快速融化的主要原因是

A.科学考察,人类干扰增多 B.温室效应

C.拉尼娜现象,降水增多 D.探险旅游,乱扔废弃物

【2】冰川的快速融化,对喜马拉雅地区产生的影响是

A.改善光热水土条件 B. 缩短冻土冻融周期

C.破坏冰川生态环境 D. 导致山地雪线下降

【答案】

【1】B

【2】C

【解析】

试题分析:

【1】喜马拉雅地区冰川融化,与科学考察、探险旅游、人类乱扔废弃物关系不大,A、D错。冰川融化主要受温度升高影响,主要是人类大量排放温室气温,温室效应增强,使全球气候变暖引发的,B对。拉尼娜现象指赤道太平洋东部和中部海面温度持续异常偏冷,冰川量增加。降水增加,冰雪量增加,喜马拉雅冰川量增加,C错。

【2】冰川快速融化,短期内水资源增加,但长远看,永久冰川减少,水资源减少,气候变干,生态恶化,A错,C对。冻土冻融周期与温度相关,与冰川快速融化无关,B错。冰川快速融化,山地雪线上升,D错。

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