一个生产车间无组织排放两种有毒气体，计算的卫生防护距一个离为

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问题单项选择题

一个生产车间无组织排放两种有毒气体，计算的卫生防护距一个离为320 m，另一个为330m，那么其卫生防护距离是( )m。

A．330

B．350

C．400

D．500

答案

参考答案：D

选择题

—Shall I give you a ride as you live so far away?

—Thank you. _________[ ]

A. It couldn't be better.

B. Of course, you can

C. If you like.

D. It's up to you.

选择题

_______,but he still could not understand it.

A．He had been told many times

B．Having been told many times

C．Told many times

D．Although he had been told many times