以被保险人支出医疗费用、疾病致残、生育或因疾病、伤害不能工作、收人减少为保险事故的人身保险被称为( )。
A.人寿保险
B.意外伤害保险
C.健康保险
D.医疗保险
参考答案:D
Under perfect competition, a firm will experience zero long term economic profit when:()
A. price is less than average total cost.
B. MR is greater than ATC.
C. MC = ATC = MR = price.
导游服务性质是()、()、()、()、()