当独头平巷发生火灾时,正在运转的局部通风机应当()。
A、停止运转
B、保持运转
参考答案:B
I feel it is you rather than the girl who ______ for being late for the speech.
A.is to blame
B.are to blame
C.is to be blamed
D.are to be blamed
钨极氩弧焊使用的电弧静特性是处于______。
A.下降段
B.水平段
C.上升段
D.任意段