问题:含硫污水的化学反应是可逆反应过程,当它们向右反应是()时,那么向...
Tuesday, September 13, 2022
问题:硫化氢气体采样时,必须佩戴防面具,并且两人同往,其中一人作业一人监护。...
Wednesday, March 8, 2023
Tuesday, December 12, 2023
Thursday, September 15, 2022
Saturday, March 16, 2024
Tuesday, December 12, 2023
Saturday, December 3, 2022
Friday, April 28, 2023
Sunday, May 21, 2023
Wednesday, September 6, 2023
问题:给泵体内排气的方法是()。 A、开泵抽液时把气体抽出来B、开泵直接把气体抽出来C、向泵体内灌满水,开排气阀把泵体内气体赶出来...
Friday, October 6, 2023
Wednesday, September 6, 2023
问题:泵是炼油化工装置不可缺少的()机械。A、气体输送B、液体输送C、固体输送...
Tuesday, December 12, 2023
问题:在相同温度和压力条件下,水溶液中,硫化氢的挥发度比氨()。...
Tuesday, December 12, 2023
问题:某设备的进出口测压仪表的读数分别为45mmHg(真空度)和700mmHg(表压),试求两处的绝对压强差为多少KPa?(已知:760mmHg=101.3×103Pa)...
Saturday, March 16, 2024
Friday, November 11, 2022
问题:机泵故障检修时,电机电源必须()。A、切断B、不切断C、无所谓...
Thursday, November 9, 2023
问题:螺杆泵﹑柱塞泵与离心泵的工作原理和操作方法都是相同的。...
Saturday, December 3, 2022
问题:润滑油的主要作用有()﹑冷却﹑冲洗﹑()﹑减振﹑保护﹑卸荷。...
Wednesday, December 28, 2022
Tuesday, December 12, 2023