单项选择题

H-live-n-one virus in the passage means （）

A．farm birds
B．infected farm animals
C．people died in Hong Kong
D．a different kind of bird flu virus

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热门试题

单项选择题

The best solution to the problem of the spread of bird flu is（）

A．to kill all the birds in an area where bird flu has been discovered
B．to kill all the chickens
C．to kill all the birds
D．to kill all the chickens when bird flu has been discovered

单项选择题

The passage focuses on（）

A．wild and farm birds
B．a fin virus
C．bird flu
D．infected birds