《外科正宗》的作者是（）
A．归脾汤
B．丹栀逍遥散
C．龙胆泻肝汤
D．左归丸合小金片
E．右归丸合小金片
参考答案：D
营运资金具有多样性、波动性、短期性和不易变现性等特点。
It was not until he arrived at the office_____ realized he had forgotten the key.
A．and he
B．when he
C．that he
D．he
