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  3. Generally, people think that fresh water is inexhaustible. Every year there is enough rain. And there is plenty of fresh water i

Generally, people think that fresh water is inexhaustible. Every year there is enough rain. And there is plenty of fresh water i

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问题     Generally, people think that fresh water is inexhaustible. Every year there is enough rain. And there is plenty of fresh water in the rivers and lakes. What is more, we have a lot of underground water.
    Actually, fresh water is in a short supply. Due to the rapid population increase, fresh water consumption remains great, Besides, with the development of industry, more water is needed. Moreover, a lot of our rivers and lakes have been so polluted that water from them is undrinkable.
    We must take some measures to solve the problem of water shortage. First, population growth should be slowed down to reduce fresh water need. Second, pollution should be controlled to purify fresh water in the rivers and lakes. What is the most important of all, we should cherish drop of water in our daily life.
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答案 一般来说，人们都认为地球上的淡水：是取之不尽，用之不竭的。每年有足够的降水。河流、湖泊里也有大量的淡水，另外，我们还有大量的地下水。 实际上，淡水供应是不足的。由于人口的迅速增加，淡水消费量一直很大。此外，随着工业的发展，更多的水被需要。许多被严重污染的河流和湖泊已变得不可饮用。 我们必须采取措施来解决水源短缺问题。首先，我们应该减缓人口增长以减少对淡水的需求。其次，对被污染的河流、湖泊进行净化。最重要的是，我们应该珍惜每一滴水。
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