电压降落的纵分量主要受哪个因素影响?()
A.无功
B.有功
C.频率
D.电流
参考答案:A
Joe, my close friend, moved to Beijing years ago, and I him since then. [ ]
A. don't see
B. didn't see
C. haven't seen
D. won't see
下列有关或有事项的表述中,正确的有( )。
A.或有事项的结果具有较大不确定性
B.或有负债应在资产负债表内予以确认
C.或有资产不应在资产负债表内予以确认
D.或有事项只会对企业的经营形成不利影响
E.或有事项产生的义务如符合负债确认条件应予确认