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【题目】These light bulbs look the same, but their ______ on the environment are different.

A. solutions B. methods C. effects D. secrets

【答案】C

【解析】句意:这些电灯泡看起来一样,但是他们对环境的影响是不同的。A. solutions解决方案;B. methods方法、方式;C. effects效果,影响;D. secrets秘密。这里应该指的是这些电灯泡看起来一样,但是他们对环境的影响是不同的,只有C选项符合题意,故选C。

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