不需要电源,特别适用于无电源的野外施工,无触电危险是()的特点。
A.气焊
B.二氧化碳气体保护焊
C.焊条电弧焊
D.氩弧焊
参考答案:A
He talked a lot about things and persons they remembered in the school [ ]
A. which
B. whom
C. what
D. where
结核性腹膜炎()
A.渗出性
B.血性
C.乳糜性
D.介于渗、漏之间
E.漏出液