Saturday, September 10, 2022
问题:分子中含有环结构的碳氢合物称为。按其结构不同分为()、()、()...
Saturday, September 10, 2022
问题:茚的化学性质比古马隆更为(),容易氧化,又容易在光作用下发生程度...
Saturday, September 10, 2022
问题:粗苯分缩器的作用在于使大部分()和水蒸气冷凝下来。...
Saturday, September 10, 2022
问题:计算题:理论计算得知一精馏塔的理论塔板数为30层,塔板效率为60...
Saturday, September 17, 2022
问题:计算题:甲班接班时蒸汽表读数为250400,10小时后交班时该表...
Saturday, September 10, 2022
问题:粗酚精馏通常采用()工艺。A、普通蒸馏B、萃取精馏C、减压蒸馏...
Monday, April 22, 2024
Saturday, October 21, 2023
Saturday, September 10, 2022
Wednesday, September 13, 2023
Saturday, September 10, 2022
Saturday, September 10, 2022
Tuesday, March 14, 2023
Saturday, September 10, 2022
问题:焦油经过精制,便能获得多种化工产品,这些产用广泛是医药、化工、(...
Saturday, September 10, 2022
问题:粗苯蒸馏时预热器后富油温度应控制在()。A、>150℃B、125~140℃C、140~150℃D、110~125℃...
Thursday, January 26, 2023
Wednesday, February 7, 2024
Saturday, September 10, 2022
Saturday, September 10, 2022
Sunday, August 20, 2023