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

题目简介

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

题目详情


The World Health Organization expects a vaccine(疫苗)against H1N1 to be            by September or October this year.
A.aggressiveB.availableC.absoluteD.abnormal
题型:单选题难度:偏易来源:不详

答案

B

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