冷模预热时间不少于（）min。 A.15 B.20 C.25 D.30_爱下问搜题

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问题单项选择题

冷模预热时间不少于（）min。

A.15

B.20

C.25

D.30

答案

参考答案：D

选择题

He________an engineer by an oil company in the Middle East.

A．was employed as

B．employed as

C．was employed for

D．employed

名词解释

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