单项选择题

It has been discovered that______.

A．H5N1 does not transmit among human beings
B．bird flu spreads only among birds
C．H5N1 is a variant of flu virus
D．bird flu adapts easily to other species

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热门试题

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.

单项选择题

Which of the following is true according to the passage

A．Man gathered more money in order to help their helpless fellows.
B．The bees are always trying to get food as much as they can.
C．Most land on the earth is held by legal owners.
D．It is doubtful whether man is the rational animal.