Saturday, October 7, 2023
开锁经营者违反第6,10,11,12,13条规定,未及时到公安机关办理备案领取《备案证》或者未及时办理变更、注销、年审手...
Friday, September 16, 2022
Thursday, September 22, 2022
单选题数字开关切换的电压和电流不大于()。A 27V0.1AB 25V0.1AC 24V0.1A...
Wednesday, September 27, 2023
Friday, September 16, 2022
什么是热继电器?它的主要组成部份是哪些?简述其工作原理。...
Thursday, September 22, 2022
Thursday, September 22, 2022
填空题磁电式电流表由()、圆柱形铁芯、()、转动轴、游丝、指针等组成。...
Sunday, July 23, 2023
单选题频率200HKz以下的振荡器常采用RC振荡器,这是因为()。A 低频时LC电路不起振B 低频时LC值较大,制造困难C 低频时LC值较小,制造困难...
Monday, January 16, 2023
Thursday, September 22, 2022
Saturday, February 17, 2024
Thursday, September 22, 2022
Saturday, September 17, 2022
仪表的精度等级规定了仪表在规定工作条件下允许的最大百分误差。...
Thursday, September 22, 2022
Thursday, September 22, 2022
在热电偶与动圈显示仪表配套的测温系统中,所采用的冷端补偿方法有()。...
Thursday, September 22, 2022
单选题某三异步电动机的额定电压为380V,其交流耐压试验电压为()A 308VB 500VC 1000VD 1760V...
Sunday, January 28, 2024
Friday, September 16, 2022
Thursday, September 22, 2022
Friday, September 23, 2022