单项选择题

The main purpose of this passage is ______.

A．to prove that man is a descendent of some higher animal
B．to satirize human greediness
C．to prove that man is superior to other animals
D．to criticize man as a maniac

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热门试题

单项选择题

H5N1 is a flu strain ______.

A．limited to Hong Kong
B．which first affected human beings in 1961
C．crossing species barriers
D．which was first isolated from American birds

单项选择题

What should be done in order to stop the spread of bird flu

A．All infected fowls have to be slaughtered.
B．The government should isolate all the flu patients.
C．No fowl should be raised from then on.
D．Specialized hospitals should be established.