火灾自动报警系统的导线,其对地绝缘电阻值( )。A.不应小于10MΩ B.不应小于 发布时间:2017-12-04 09:46 │ 来源:www.tikuol.com 题型:单项选择题 问题: 火灾自动报警系统的导线,其对地绝缘电阻值( )。A.不应小于10MΩB.不应小于16MΩC.不应小于20MΩD.不应小于25MΩ
题型:单项选择题 He is going to _______ home for two weeks. [ ]A. be away fromB. leave from C. be away D. leave 查看答案
题型:单项选择题 ---My car has broken down , Would you please sent someone to ____? ----OK , my driver will soon be with you .A.give me upB. pick me upC. cheer me upD. turn me up 查看答案