120—1型控制阀紧急活塞杆稳定限制孔为()。 A.φ1.0mm B.φ1.2mm 发布时间:2019-01-18 01:43 │ 来源:www.tikuol.com 题型:单项选择题 问题: 120—1型控制阀紧急活塞杆稳定限制孔为()。A.φ1.0mmB.φ1.2mmC.φ1.8mmD.φ2.5mm
题型:单项选择题 感应式电能表的是由其本身的消耗以及由它引起的各元、部件达到热平衡状态所需的时间长短而定。对同一只电能表来讲,热稳定的时间()。A.电流元件要比电压元件长B.电压元件要比电流元件长C.不一定一样D.电压元件和电流元件一样长 查看答案
题型:单项选择题 Which of the following statements about the discounted payback period is FALSE The discounted payback :()A. period is generally shorter than the regular payback.B. frequently ignores terminal values.C. period is the time it takes for the present value of the project cash inflows to equal the cost of the investment. 查看答案