Saturday, March 9, 2024
Monday, January 23, 2023
Tuesday, September 13, 2022
Saturday, March 9, 2024
Tuesday, August 22, 2023
问题:触媒低浓度食入或吸入,对喉腔、鼻腔、粘膜、牙龈等有刺激作用...
Friday, February 3, 2023
问题:固碱干燥的作用是什么()A、除VC的水分B、除酸性物质C、除铁离子D、除盐酸...
Tuesday, August 22, 2023
Friday, December 8, 2023
Saturday, March 18, 2023
问题:当催化剂HgCl2装入转化器,即通C2H2气进行干燥。...
Monday, February 5, 2024
问题:氯乙烯合成要求氯化氢纯度为()。A、90~92%B、92~93.5%C、96~98%D、93%...
Thursday, June 22, 2023
问题:冷冻站输送出的冷冻水有()哪几种A、-35℃B、-25℃C、0℃D、5℃...
Sunday, February 4, 2024
Sunday, August 6, 2023
问题:混合脱水主要利用盐酸冰点低的物理性质,将氯化氢与乙炔混合后的气体温度降到(),从而降低了水蒸气在混合器中的饱和蒸汽压而达到对混合气进行()的目的。...
Thursday, June 22, 2023
Monday, February 5, 2024
问题:正常生产中氯化氢压力()乙炔压力,以防氯化氢倒入乙炔装置。A、大于B、等于C、小于D、都不是...
Wednesday, July 19, 2023
Thursday, December 29, 2022
Monday, February 5, 2024
Friday, September 15, 2023
Monday, February 5, 2024