可引起血氨升高的疾病有（）
A.重症肝炎
B.尿毒症
C.低蛋白饮食
D.贫血
E.肝性脑病
参考答案：A, B, E
Even though the producer surplus increases under a monopoly scenario, relative to one of perfect competition, the consumer surplus :（）
A. decreases by a lesser amount.
B. decreases by a greater amount.
C. decreases by an equal amount.
关键绩效指标建立的一般原则是（）。
A.SMART
B.Specific
C.Measurable
D.Relevent
