ZPW-2000A型无绝缘移频自动闭塞接收端对于小轨道电路频率信号呈现低的()。A. 发布时间:2017-05-28 03:32 │ 来源:www.tikuol.com 题型:单项选择题 问题: ZPW-2000A型无绝缘移频自动闭塞接收端对于小轨道电路频率信号呈现低的()。A.极阻抗B.零阻抗C.衰耗阻抗D.匹配阻抗
题型:单项选择题 Under no circumstances _____ that I would meet so many problems when I decided to take the job.A.do I expectedB.have I expected C.I expectedD.did I expect 查看答案