题目内容

下列化工物料有毒有害的有()

A. H2
B. Cl2
C. N2
D. HCl

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调车组连结员基本功演练中观速误差不超过()为合格。

A. 10%
B. 15%
C. 1%
D. 12.5%

食品处理区与外界相通的门、窗均应有防尘、防鼠、防虫害设施。

A. 正确
B. 错误

The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, () is collected and returned back to the boiler for heating up again to steam.

A. the former
B. the first
C. the latter
D. the last

下列不需要建立备查账的是( )。

A. 租入的固定资产
B. 应收票据
C. 委托加工材料
D. 购人的固定资产

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