试题与答案

置换动火就是通过清洗,用惰性介质置换,将残存的可燃物排出,使其含量低于爆炸极限的下限

题型:判断题

题目:

置换动火就是通过清洗,用惰性介质置换,将残存的可燃物排出,使其含量低于爆炸极限的下限,从而保证补焊操作的安全。()

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题型:阅读理解

阅读下面短文,根据短文内容判断句子的正误。正确的涂A,错误的涂B.

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