在研制标准检验方法时，必须进行现场调查，主要目的是什么（）。

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问题单项选择题

A.了解待测物在空气中的存在状态

B.了解待测物在空气中的扩散规律

C.了解工人接触待测物的情况

D.了解现场生产过程中待测物的产生情况

E.了解现场气象条件对待测物的影响

答案

参考答案：A

选择题

To people's great surprise, in Japan Earthquake, a young man ________ the big earthquake under the ruins where he stayed 7 days without anything to eat.

A．lived

B．stayed

C．survived

D．remained

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选择题

It __________ Tom that parked the car here, as he is the only one with a car.

A．may be

B．might have been

C．must have been

D．could be

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