交流电经过轿式整流后得到（）
A、理想的直流电
B、恒定的直流电
C、脉动的直流电
D、半波的直流电
参考答案：C
In many places in China, _____bicycle is still _____popular means of transportation.[ ]
A. a;the
B./;a
C. the;a
D. the;the
民族消亡
