题目内容
() 7. The side effects (副作用) that the medicine has are still to us. More research is needed.
A. unknown B. unnecessary C. unusual D. uncommon
7.A
7.A
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题目内容
() 7. The side effects (副作用) that the medicine has are still to us. More research is needed.
A. unknown B. unnecessary C. unusual D. uncommon
7.A