停工检修前为什么要先处理管线?
参考答案:
停工检修前必须先处理管线是因为检修前管线内残留有大量的可燃性的液体及挥发气,若遇明火即可能燃烧爆炸,造成重大人员及财产损失。
A.She is not interested in the article.
B.She has given the man much trouble.
C.She would like to have a copy of the article.
D.She doesn’t want to read the article.
网膜孔的前界是()。
A.下腔静脉
B.肝尾状叶
C.肝十二指肠韧带
D.胰头
E.十二指肠上部