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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