杠杆千分尺的分度值有()两种A.0.001,0.002mm B.0.002,0.00 发布时间:2017-06-24 15:24 │ 来源:www.tikuol.com 题型:单项选择题 问题: 杠杆千分尺的分度值有()两种A.0.001,0.002mmB.0.002,0.004mmC.0.004,0.008mmD.0.01,0.02mm
题型:单项选择题 根据《通信线路工程验收规范》,配线架检验时,光纤配线架应符合下列要求()A.光纤配线架各功能模块应齐全,装配完整B.光纤配线架的高压防护接地装置与机架间的绝缘电阻≥1000兆欧姆/500v(直流)C.机架间的耐压≥3000v(直流)D.1min内不击穿,无飞弧现象 查看答案