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单选题
What is the real cause of the potential water crisis?
A
The world population is increasing faster and faster.
B
Half of the world’s water resources have been seriously polluted.
C
Humanity has not placed sufficient value on water resources.
D
Only half of the world’s water can be used.
参考答案
参考解析
解析：
细节题。文章第一段作者说如果找们现在能比过去更加重视水的话，世界未必就会陷入缺水的困境（即使人口增一倍）。下文阐述避免将来世界缺水的对策和方法，从上文叙述说明水的潜在危机不是人口增加也不是污染严重造成的。更不是用得多，才用了不到一半。根本原因是过去我们没有引起足够的重视，如能像重视石油那样重视水就不会发生水危机，因此C为答案。
细节题。文章第一段作者说如果找们现在能比过去更加重视水的话，世界未必就会陷入缺水的困境（即使人口增一倍）。下文阐述避免将来世界缺水的对策和方法，从上文叙述说明水的潜在危机不是人口增加也不是污染严重造成的。更不是用得多，才用了不到一半。根本原因是过去我们没有引起足够的重视，如能像重视石油那样重视水就不会发生水危机，因此C为答案。
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