用实验的方法测量同步发电机的空载特性时，要求保持发电机的（）不变。
A.转速
B.端电压
C.励磁电流
D.气隙磁通
参考答案：A
— Would you mind my using your dictionary?
— ____. Here you are. [ ]
A. Of course
B. No, thanks
C. No, not at all.
D.Yes, not at all
Print Screen键为大小写转换键。 ( )
