The doctor said this medicine is ______ against lung cancer.A、efficientB、effect

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问题 The doctor said this medicine is ______ against lung cancer.

选项 A、efficient
B、effective
C、expensive
D、effort

答案 B

解析医生说，这种药对于治疗肺癌是很有效的。本题考查形容词词意辨析。A．有效率的B．有效的C．昂贵的D．努力。因为此空需填形容词，所以首先排除D选项，再根据句意故选B。

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