Original usage refers to rivers that ______ . The ever-increasing exploitation of rivers has resulted in various problems excep

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问题 Original usage refers to rivers that ______ .
The ever-increasing exploitation of rivers has resulted in various problems except ______ .

选项 A、decrease of the depth of the channels
B、fall of the water table of the surrounding area
C、destruction of the rivers in ecosystems
D、water pollution

答案A

解析 第七段第一句提到对河流永不休止的开发引起了一系列的问题,随后就此展开论述。其中[B]、[C]、[D]都提到,唯独[A]与文中的...increasing the depth of the channels to permit passage of larger vessels. 相矛盾,符合题意,故为答案。
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