大定风珠的功用是（）
A.滋阴息风
B.平肝息风
C.滋阴潜阳
D.祛风止痉
E.清热息风
参考答案：A
解析：大定风珠滋阴息风。故本题选A。
—Philip is the first place winner in the writing competition.
—_________ pleasant surprise this gave his teacher!
A．What
B．What a
C．How
D．How a
在串联电路中，总电压等于各串联导体分电阻的端电压，即U=Ul=U2。
