最早发现电流周围存在磁场的科学家是[ ]
A.牛顿
B.伽利略
C.奥斯特
D.安培
答案:C
It is ________ to think a few of the students still don't take the reading homework seriously. [ ]
A. disturbed
B. disturbing
C. interrupting
D. interrupted
PMS台帐录入时,主变压器额定电流的填写()
A.按铭牌填写,选择最高电压等级的任一分头对应的电流
B.按铭牌填写,选择最低电压等级的中间分头对应的电流
C.按铭牌填写,选择最高电压等级的中间分头对应的电流