电力用油在变压器内起润滑作用.在机组内起绝缘作用。
参考答案：错
When the seriously injured man was taken to a hospital _____, he was half conscious; while lying in bed, he heard a voice ______ calling him. [ ]
A. close; at a distance
B. near; in the distance
C. nearby; in the distance
D. close; from distance
间断灭弧焊操作手法一般有哪几种（）
A.一点法、两点法2种
B.一点法、两点法和三点法3种
C.两点法和三点法2种
