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  3. The newly-discovered medicine had its ______ only on ordinary colds.

The newly-discovered medicine had its ______ only on ordinary colds.

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问题 The newly-discovered medicine had its ______ only on ordinary colds.
选项 A、influence
B、efficiency
C、impression
D、effect
答案D
解析 本题测试名词辨义。influence：影响，have an influence on sb/sth：对……产生影响； efficiency：效率；impression：印象，leave an impression sb：给某人留下印象；effect：效果。本句大意：新近发现的药物只对常规感冒有效果。
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