桂枝汤主治证的病机是（）
A.外感风寒表实
B.外感风寒湿邪
C.风邪犯肺
D.外感风寒表虚
E.外寒内饮
参考答案：D
69. We had to _______hundreds of people because all of the seats were sold.
A．turn away
B．turn down
C．turn against
D．turn about
生产性能测定的重要性表现在哪些方面？
