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The world is not only hungry; it is also thirsty for water. This may seem st
The world is not only hungry; it is also thirsty for water. This may seem st
游客
2024-07-26
5
管理
问题
The world is not only hungry; it is also thirsty for water. This may seem strange to you because nearly 75% of the earth’s surface is covered with water. But about 97% of this huge amount is seawater or salt water. Man can only drink and use the other 3%—the freshwater that comes from rivers, lakes, underground, and other sources. And we cannot use all of that, because some of it is in the form of iceberg and glaciers (冰河). Even worse, some of it has been polluted.
However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us. But our need for water is increasing rapidly almost day by day. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry.
We all have to learn how to stop wasting our precious water. One of the first steps we should take is to develop ways of reusing it. Experiments have already been done in this field, but only a small scale. The systems that have been worked out resemble those used in spacecraft. [br] The author says that we may face a severe worldwide water shortage in the future because______.
选项
A、the small amount of fresh water is constantly being replaced by rainfall
B、some of the water has been polluted
C、our need for fresh water is increasing rapidly
D、huge amount of the water on earth is seawater
答案
C
解析
推理判断题。根据题干中的a severe world wide water shortage定位到文章第二段第三句。联系上文可知,对水日益增长的需求才是水资源越来越紧张的真正原因。
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