题目内容

在对石油化工火灾进行冷却控制时,对于着火的负压设备,根据需要和条件,可向负压设备注入氮气和水蒸气,提高设备内压力。

A. 对
B. 错

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在石油化工火灾中,对于着火,并已形成稳定燃烧的设备能否发生爆炸?

Yesterday was my birthday. My mother .

A. made a cake to me
B. made a cake me
C. made for me a cake
D. made me a cake

Let's go swimming, ?

A. aren't we
B. shall we
C. will you
D. won't we

Stranger was seen into the building.

A. walk
B. to walk
C. walked
D. having walked

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