根据《环境空气质量标准》(GB 3095—1996)的规定，日平均是指任

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问题单项选择题

根据《环境空气质量标准》(GB 3095—1996)的规定，日平均是指任何一日的平均浓度，每日至少有( )h的采样时间。

A．4

B．6

C．10

D．12

答案

参考答案：D

单项选择题

A．(A) I know many business people at the Beachside Hotel.

B．(B) The Beachside is the only favorite hotel for many business people.

C．(C) Many business people like to hold conferences in the Beachside Hotel.

D．(D) Many business people provide the best conference facilities for the Beachside.

判断题

指示提单代表货物所有权，可以通过背书转让。