政府收费是我国公共财政收人管理体制中的一个重要形式，但是，政府的收费必须合理，否则就变成乱收费。通常，确定政府收费水平的主要依据是（）。
A. 政府行为或是提供服务的收益情况
B. 政府财政的需要
C. 收费对象的经济承受能力
D. 政府行为或提供服务的成本
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Navigator与INTERNET Explore为用户提供的服务有()
A. WWW搜索
B. 讨论
C. E-mail
D. 拨号访问
E. 文件传输
According to the passage, the Nazca lines were found ______.
A. in mountains.
B. in stones.
C. on animals.
D. on a plain.
There has been increasing interest in the Nazac lines mainly because of ______.
A. the participation of scientists.
B. the emergence of the internet.
C. the birth of new theories.
D. the interest in the Internet.
According to the passage, a successful scientist would not ______.
A. easily believe in unchecked statements,
B. easily criticize others' research work.
C. always use his imagination in work.
D. always use evidence from observation.
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