爆炸容器的材料和尺寸对爆炸极限有影响。若容器材料的传热性越好,管径越细,火焰在其中越难传播,爆炸极限范围变小。(  )

爆炸容器的材料和尺寸对爆炸极限有影响。若容器材料的传热性越好,管径越细,火焰在其中越难传播,爆炸极限范围变小。(  )

查看答案

The White House is open to the public__________.

The White House is open to the public__________.A.on weekdays only B.five days a

查看答案

The government is trying to find a way to deal with the prob

The government is trying to find a way to deal with the problem of pollution____

查看答案

安全生产责任制的内容主要包括两个方面:一是纵向方面;二是(  )。

安全生产责任制的内容主要包括两个方面:一是纵向方面;二是(  )。

查看答案

_______that l wash’t going to get much chance for promotion,

_______that l wash’t going to get much chance for promotion,I soon became bored

查看答案