The phrase "immune to" (Line 3, Para. 1) are used to mean ______. The author would probably consider research about the effects

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问题 The phrase "immune to" (Line 3, Para. 1) are used to mean ______.
The author would probably consider research about the effects noise has on people to be ______.

选项 A、unimportant
B、impossible
C、a waste of money
D、essential

答案D

解析 推断题。全文都在谈论噪音对人健康的危害,但人们并没有意识到这一点,所以可以推断,作者认为对噪音的影响的研究是非常必要的,所以D正确。
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