题目内容

通风与空调工程不必实行隐蔽工程验收。()

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对承重结构的混凝土、防水混凝土和有特殊要求的混凝土都应有开盘鉴定。()

I kept looking at the man, wondering _________.

A. whether I have seen him before
B. where I had seen him before
C. that I had seen him before
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A. led into
B. led to
C. led
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工作性能试验记录是指通风与空调工程制冷系统完成后，按规范要求必须进行的测试项目。()