问答题

“禽流感”危害的后果及其严重性 2．造成这种突发疫情的原因 3．我们应该如何对待 Useful words and expressions: 禽 流 感: avian influenza 预警系统: warning system 应急机制: emergency response mechanism Say No to Avian Influenza

【参考答案】

Say No to Avian Influenza Avia......

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单项选择题
Why are weedy plants a source of traditional medicines according to Coley
A．They are within human reach.
B．They grow on cultivated ground.
C．They crowd out cultivated plants.
D．They grow profusely where it is not wanted.
单项选择题
Coley took a(n) ______ attitude towards Prof. Stepp's studies.
A．enthusiastic
B．neutral
C．positive
D．questioning
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