题目内容
The World Health Organization expects a vaccine(疫苗)against H1N1 to be by September or October this year.
A.aggressive B.available C.absolute D.abnormal
B

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题目内容
The World Health Organization expects a vaccine(疫苗)against H1N1 to be by September or October this year.
A.aggressive B.available C.absolute D.abnormal
B