It is reported that this medicine is _______ against lung cancer.

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问题 It is reported that this medicine is _______ against lung cancer.

选项 A、economic
B、easy
C、expensive
D、effective

答案D

解析 本题考查形容词辨析。economic意为“经济(上)的,合算的”;easy意为“简单的,容易的”;expensive意为“昂贵的”;effective意为“效果好的,显著的”。根据题意,选项D正确。
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