单项选择题

The observation of weather conditions by satellites is advantageous because it ______.

A．gives the scientist information not obtained readily otherwise
B．enables man to alter the weather
C．uses electronic instruments
D．is modern
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单项选择题
Why do policemen feel separated from the rest of the world
A．Because they feel superior to simple-minded people around them.
B．Because they are suspicious of the people around them.
C．Because they do not receive due support from society.
D．Because they find people insincere to them.
单项选择题
What's the policeman's biggest headache
A．He has to justify his arrests while unable to provide sufficient evidence in most cases.
B．He has to provide the best possible public service at the least possible expense.
C．He has to get the most desirable results without breaking the law in any way.
D．He can hardly find enough time to learn criminal law while burdened with numerous criminal cases.
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