下列不属于环境保护计划中的水污染治理范围的是( )。
A. 长江上游
B. 黄河中游
C. 松花江流域
D. 长江下游
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Large numbers of farmers have poured into towns because（）.
A. they can hardly support their families on farms
B. they are unhappy with their life in the country
C. the rural areas are too crowded with people
D. they hope to have their own business
If you want to read full-text journals online, you usually have to （）.
A. seek for a large amount of information
B. be connected to various databases
C. be introduced by the local library
D. pay a monthly membership fee
According to the writer, the problem with crowded cities will be solved if （）.
A. traditional methods of farming are well kept
B. conditions in rural areas are much improved
C. the government can provide more jobs
D. violence could be controlled in dries
Which factor is most important for people to be attracted to live in the country？（）
A. Their expectation.
B. Their interests.
C. Their income.
D. Their attitude.
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