Thursday, September 15, 2022
Saturday, September 10, 2022
Sunday, September 11, 2022
Saturday, September 10, 2022
Thursday, September 15, 2022
问题:中性点不接地系统发生单相接地故障时电压变化的基本特点是()。...
Thursday, September 15, 2022
Thursday, September 15, 2022
Saturday, September 10, 2022
问题:压强的国际单位是()。A、牛顿B、牛顿/米3C、公斤...
Sunday, January 22, 2023
Thursday, September 15, 2022
问题:水泵流量的表示符号是()A、QB、HC、ND、HS...
Friday, November 3, 2023
问题:改变泵的()可以改变离心泵的性能。 A、扬程B、效率C、电机功率D、性能曲线...
Tuesday, August 15, 2023
Saturday, September 10, 2022
问题:继电器型号DX-11中的文字符号X代表()继电器。A、电流B、中间C、时间D、信号...
Saturday, September 2, 2023
问题:串联泵的()应基本相等,否则容量小的泵将产生超负荷或容量大的泵不...
Saturday, September 10, 2022
问题:当管道的直径和长度一定时,管道阻力的大小与液体()成正比。...
Sunday, September 11, 2022
问题:化工生产中常见的几种离心泵是以下哪项()。A、水泵、油泵、杂质泵B、水泵、油泵、气泵C、油泵、气泵、杂质泵D、水泵、杂质泵、气泵...
Tuesday, June 27, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022
Saturday, September 10, 2022