The World Health Organization expects a vaccine(疫苗)against H1N1 to be by September or Octo

发布时间：2020-08-16 13:34:27


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

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A. aggressive
(答案→)B. available
C. absolute
D. abnormal
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