Doctors are loath to prescribe powerful painkillers because their abuse as addictive drugs is a danger for many patients.
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Atheir abuse as addictive drugs is
分析该选项
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Bas addictive drugs, their abuse is
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Cthe abuse of such addictive drugs is
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Dthe abuse of such addictive drugs are
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Ethe abuse of them as addictive drugs is
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显示答案
正确答案: C