Saturday, September 17, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
接地装置安装中,埋在地下部分的接地体,其接头应采用()。...
Sunday, September 11, 2022
Saturday, September 17, 2022
中间继电器有()副动静合触头。A、2B、3C、4D、5...
Sunday, May 5, 2024
Friday, June 9, 2023
计算题:某电容接在频率为50Hz、电压220V电源上时,通过的电流为7A,求该电容多大?...
Sunday, July 30, 2023
Sunday, September 11, 2022
Saturday, September 17, 2022
通信防雷系统要求()测一次接地电阻。A、1年B、6个月C、3个月D、1个月...
Wednesday, May 3, 2023
过流保护的类型有()。A、切断保护B、限流保护C、限流-切断保护D、电子保护...
Tuesday, April 16, 2024
Saturday, September 17, 2022
供油系统油箱的存油量一般应保持在其容积的()以上。A、1/3B、2/3C、1/2D、1/5...
Sunday, October 8, 2023
为保证通信质量,要求野战通信电源装(设)备上应有防干扰装置。...
Saturday, September 17, 2022
电度计量用的电流互感器,应采用(),其准确度等级不应低于()。...
Saturday, September 17, 2022
高频功率放大器效率最高时是()状态。A、欠压B、过压C、临界D、微过压...
Thursday, January 18, 2024
Saturday, September 17, 2022
Saturday, September 17, 2022
Saturday, September 17, 2022