当发电机失掉励磁时的现象为()。
A.转子电流等于或接近于零
B.发电机电压升高
C.定子电流降低
D.无功功率指示不变
参考答案:A
Recent studies have shown that most US graduates receive cash as gifts, though the amount received _____
from person to person. [ ]
A. prefers
B. promotes
C. varies
D. suffers
与企业经营有关的行政立法包括:()
A.行政处罚法
B.企业法人登记管理条例
C.行政诉讼法
D.劳动法