下列情况中,导致不充电的原因是()。
A.发电机V传动带折断或松弛
B.电源系统短路或断路
C.调节器调整不当或调节器故障
D.发电机不发电
参考答案:A, B, C, D
As Commander-in-Chief of the armed forces,I have commanded that all measures
for our defense.
A.had been taken
B.be taken
C.would be taken
D.be made
焊条直径的选择应考虑()、()、()、()。