Sunday, September 11, 2022
Sunday, September 11, 2022
Thursday, February 29, 2024
问题:终冷器内的洗涤操作对粗苯生产有什么影响(粗苯洗涤做)?...
Sunday, September 11, 2022
问题:焦油蒸馏(常压)生产煤沥青二段温度应控制在()℃。...
Sunday, September 11, 2022
Sunday, September 11, 2022
Sunday, March 10, 2024
Monday, April 29, 2024
Monday, September 12, 2022
问题:酚类具有弱()性,随着烷基数量的增加,它将减弱。...
Monday, March 20, 2023
问题:计算题:洗涤实际强度为87℃,仪表显示温度为89℃,绝对误差和相对误差是多少?...
Sunday, April 14, 2024
Sunday, April 14, 2024
Sunday, September 11, 2022
Friday, March 24, 2023
Saturday, November 12, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:焦温度愈高,粗苯中不饱和化合物的含量愈(),这些不饱和化合物极易发生()作用和树脂化作用。...
Sunday, October 8, 2023
Sunday, September 11, 2022
Sunday, September 11, 2022