全波整流电路的整流电压平均值是半波整流的（）倍。
A.0.45
B.0.9
C.1
D.2
参考答案：D
试述360度反馈评价。
Although her initial success was （） by the fact that she was the daughter of a famous actor, the critics later acclaimed her as a star in her own right.
A．enhanced
B．impeded
C．refuted
D．superseded
