Friday, January 19, 2024
Thursday, March 7, 2024
Friday, October 20, 2023
问题:在有线电视的不良施工中,通常可以造成的后果有:()、直接波串入和传输衰减量的增大。...
Thursday, March 7, 2024
Thursday, June 15, 2023
问题:电容在充电时,随着其端电压的由低变高,充电电流也由小变大。...
Sunday, September 11, 2022
问题:晶三级体管内部的两个PN结分别称为()结和集电结。...
Monday, March 11, 2024
问题:充电电流能穿过电容器,并从一个极板到达另一个极板。...
Wednesday, September 14, 2022
问题:在内电路中电流的方向与电动势方向相同,在外电路中电流的方向与电压的方向()...
Thursday, December 15, 2022
Sunday, July 9, 2023
问题:正弦交流电路中,负载的三种电路性质分别是阻性、()性和容性。...
Wednesday, September 14, 2022
Wednesday, September 14, 2022
问题:正弦交流电路中的三种电功率是()功率、有功功率和无功功率。...
Thursday, March 7, 2024
问题:判断磁场对通电导体作用力方向,用()A、左手定则B、右手定则C、安培定律D、楞次定律...
Thursday, March 7, 2024
Sunday, September 10, 2023
问题:明铺室内用户线时,线卡间距在()m左右,转弯时弯曲半径不应小于电缆直径的5-10倍。...
Saturday, January 6, 2024
Sunday, July 9, 2023
问题:在选用电阻时,其额定功率要选用等于实际承受功率的()倍时才能保证...
Wednesday, September 14, 2022
Monday, March 11, 2024
Saturday, April 29, 2023