Saturday, December 3, 2022
问题:带电设备灭火时严禁使用()。A、干粉灭火器B、1211灭火器C、泡沫灭火器
Monday, December 9, 2024
Wednesday, May 24, 2023
Thursday, January 9, 2025
Saturday, August 17, 2024
问题:氨溶解于水中,其溶液呈()性。A、酸性B、中性C、碱性
Friday, November 11, 2022
问题:当输送非粘性介质时,泵所需的汽蚀余量()。A、增大B、减小C、不变
Wednesday, June 7, 2023
Saturday, March 16, 2024
Sunday, December 25, 2022
Friday, November 24, 2023
问题:硫化氢侵入人体的主要途径是()。A、呼吸道B、皮肤C、消化道
Tuesday, September 13, 2022
问题:两台性能相同的离心泵串联后每台泵的扬程()单台泵的扬程。
Wednesday, September 6, 2023
Saturday, December 3, 2022
Monday, December 9, 2024
Thursday, September 15, 2022
Saturday, December 3, 2022
Wednesday, September 6, 2023
问题:离心泵机械密封泄漏率要求重质油不超过()滴/分。A、30B、20C、10D、5
Friday, July 28, 2023
Tuesday, September 13, 2022
Thursday, November 9, 2023