具有解毒消痈，化痰散结，活血祛瘀功用的方剂是
A．四妙勇安汤B．犀黄丸C．仙方活命饮D．大黄牡丹汤E．苇茎汤
参考答案：B
— Thank God you’re safe!
— I stepped back, just ____ to avoid the racing car.
A．in time
B．in case
C．in need
D．in vain
ISDN定义了哪几种信道？
