()是指当主保护拒动时,由本电力设备或线路的另一套保护来实现。 A、主保护 B、远后 发布时间:2017-10-17 10:28 │ 来源:www.tikuol.com 题型:单项选择题 问题: ()是指当主保护拒动时,由本电力设备或线路的另一套保护来实现。A、主保护B、远后备保护C、辅助保护D、近后备保护
题型:单项选择题 — Do you know what Tom does all day?— I know he spends at least as much time watching TV as he _____ his lessons. [ ] A. is doing B. does C. spends in D. does doing 查看答案