试题与答案

城市各类区域铅垂向Z振级标准值,在居民、文教区的限值是()。A、昼间75DB A.,

题型:单项选择题

题目:

城市各类区域铅垂向Z振级标准值,在居民、文教区的限值是()。

A、昼间75DBA.,夜间72DBA.

B、昼间65DBA.,夜间62DBA.

C、昼间70DBA.,夜间67DBA.

D、昼间80DBA.,夜间80DBA.

答案:

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