问题:从地下开采出未经炼制的石油叫原油,原油中()含量一般较少,它主要...
Friday, September 16, 2022
问题:连续操作釜式反应器的热稳定条件是Qr=Qc,且dQr/dT<dQ...
Friday, September 16, 2022
Friday, September 16, 2022
Sunday, September 11, 2022
Friday, September 16, 2022
Tuesday, September 13, 2022
Friday, September 16, 2022
Tuesday, September 13, 2022
问题:仪表的电线、电缆要经常检查,须绝缘良好。电线周围不准()。...
Tuesday, September 13, 2022
问题:填料塔以清水逆流吸收空气、氨混合气体中的氨。当操作条件一定时(Y...
Saturday, September 10, 2022
问题:逆流吸收的填料塔中,当吸收因数A1,填料层无限高,则气液平衡出现在塔的什么位置()。A、塔顶B、塔上部C、塔底D、塔下部...
Wednesday, December 20, 2023
Friday, September 16, 2022
问题:在生产岗位上把好()是化工行业生产人员职业活动的依据和准则。...
Saturday, September 10, 2022
Friday, September 16, 2022
问题:把不同材料、不同加工者、不同操作方法、不同设备生产的两批产品混在...
Friday, September 16, 2022
问题:两级压缩氨制冷系统通常采用一级节流中间完全冷却循环。...
Friday, September 16, 2022
Saturday, September 10, 2022
问题:对于工业生产来说,提高传热膜系数最容易的方法是()...
Saturday, September 10, 2022
Friday, September 16, 2022
问题:在管壳式换热器中,用饱和蒸汽冷凝以加热空气,下面两项判断为()。...
Saturday, September 10, 2022