装设电抗器的目的是:增大短路阻抗,限制短路电流,减小电压波动。
参考答案:对
She is heard_______ every day in her room.
A.sings
B.sing
C.to sing
D.singing
旅游团抵达酒店,由地陪来分配住房,全配领队配合。()