并入小电网的发电机调整励磁将改变发电机的()输出。
A、电压U
B、无功Q
C、电压U和无功Q
D、有功
参考答案:A
You are _____________ them. [ ]
A. wearing
B. wear
C. to wear
临床大动脉瘤的诊断最好的方法是心血池动态显像。