试题与答案

对于制冷量大小1250kW的溴冷机,负压检漏合格的标准是:24小时后机组真空度下降值

题型:单项选择题

题目:

对于制冷量大小1250kW的溴冷机,负压检漏合格的标准是:24小时后机组真空度下降值不超过()。

A.3Pa

B.5Pa

C.7Pa

D.10Pa

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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题型:阅读理解

B

 

小题1:The theme park in Beijing was made of ___________.

A.wood

B.stone

C.plastic

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A.see the walking robot maid

B.visit a replica of the Great Wall

C.watch a football match

D.buy Nike sports clothes小题3:Which is true about the walking robot maid?

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B.They spent three years developing it.

C.She can heat food in a microwave oven.

D.She can’t be used in different or dangerous situations for humans.

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