对于刚完成专机飞行任务,在()小时内未执行其他飞行任务而又再次安排专机任务的航空器无故障可不进行试飞,但应做相当于试飞后的检查工作。
A.6
B.12
C.48
D.72
参考答案:D
可以协助诊断输卵管妊娠破裂的检查项目是()
A.宫腔镜检查
B. * * 镜检查
C. * * B型超声检查
D.尿妊娠试验
E.后穹窿穿刺
Compared with the net present value (NPV) method, the internal rate of return (IRR) method of evaluating investment projects:()
A. is the preferred method for evaluating mutually exclusive projects.
B. is not sensitive to the pattern or timing of the cash flows from the period.
C. assumes that all cash flows from the project will be reinvested at the computed IRR.