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Scientists who study ________ noise say that ________ average noise level in New York is 72.5 decibels.

A./;the B./;an C.the;an D.a(chǎn);the

 

A

【解析】答案 A [noise為不可數(shù)名詞,所以前面不加任何冠詞,the average為固定用法,意為“平均”。]

 

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