Thursday, September 15, 2022
Saturday, September 17, 2022
问题:通信电缆线路在发生障碍时,应本着先抢通后修复,先重要后一般的障碍...
Sunday, September 11, 2022
问题:上下人孔时,必须(),严禁扒着人孔口跳下、扒上。...
Thursday, September 15, 2022
Wednesday, September 14, 2022
Saturday, September 17, 2022
问题:有线电视系统中常用的三种分配网是星形网、树枝形网、和()....
Saturday, September 17, 2022
Saturday, September 17, 2022
Saturday, September 17, 2022
Tuesday, January 3, 2023
Friday, September 16, 2022
问题:二极管按用途分:()、二极管、整流二极管、()二极管、稳压二极管...
Sunday, September 11, 2022
Saturday, September 17, 2022
问题:全塑电缆的规格程式(芯线总绞合方式)可分为基本*单位、50对超单...
Saturday, September 17, 2022
Friday, September 16, 2022
问题:在通信线路中,杂音对信号的影响主要决定于杂音绝对值的大小,而不决定于信号与杂音的比值。...
Saturday, October 1, 2022
问题:光纤通信就是以()作为信号载体,以()作为传输媒介的一种通信方式...
Wednesday, September 14, 2022
问题:市区内杆路一般采用()。A、预应力水泥杆B、非预应力水泥杆C、木杆D、电力杆...
Sunday, December 3, 2023
Sunday, September 11, 2022
Saturday, September 17, 2022