根据环境因素的可控程度，决策分三大类：确定型决策、（）和不确定型决策。
参考答案：风险型决策
Who worked the dishes on the table?
Bill _____. [ ]
A. Was
B. did
C. is
D. does
疔疮走黄的主要病理是：（）
A.正虚
B.邪实
C.阴伤
D.腑实
E.表虚
