带有电子镇流器的荧光灯的功率因数为（）。
A.0.4～0.6
B.0.6～0.8
C.0.8～0.9
D.>0.9
参考答案：D
I think swimming is _____ hiking.[ ]
A. as interesting than
B. as more interesting as
C. as interesting as
D. more interesting as
若麻毒内陷，正气不足，阳气外脱，可出现内闭外脱之险证。若损及心阳，则可导致（）。
