多形红斑风寒证，内治应首选
A．桂枝汤B．桑菊饮C．银翘散D．茵陈蒿汤合消风散E．普济消毒饮
参考答案：A
A．A＞B
B．A=10-4B
C．B=10-4A
D．A=B
You may get lost easily in big cities like Beijing you have a map or a guide.
A．unless
B．if
C．when
D．until
