感冒之因虽多，但有主次不同，其主因是（）
A．寒邪入中
B．风邪侵袭
C．热邪犯胃
D．燥邪入侵
E．外湿浸渍
参考答案：B
The president of the World Bank says he has a passion for China, ______ he remembers starting as early as his childhood.
A．that
B．which
C．as
D．when
A．副线圈输出交流电的频率为10Hz
B．交流电压表的示数为20V
C．电阻R上消耗的电功率为2kW
D．原线圈中电流的最大值为100A
V