A2 题型 女50岁,劳累时有肿物自阴道脱出,诊断为子宫脱垂,主要病因是
A、分娩损伤
B、产褥期过早体力劳动
C、腹压长期增加
D、盆底组织发育不良
E、盆底组织退行性改变

单项选择题Brown and Company uses the internal rate of return(IRR)method to evaluate capital projects, Brown is considering four independent projects with the following IRRs:Brown's cost of capital is 13%. Which one of the following project options should Brown accept based on IRR?（ ）

单项选择题A.只与溶质的性质有关B.只与溶剂的性质有关C.与溶剂和溶质的性质都有关D.与溶剂和溶质的性质都无关