Monday, November 20, 2023
Tuesday, May 16, 2023
问题:粗苯蒸汽在空气中的爆炸极限为1.4~7.5%(体积浓度)。...
Wednesday, October 25, 2023
Monday, November 20, 2023
Sunday, December 3, 2023
问题:当煤气中苯族烃的分压()洗油液面上粗苯的平衡蒸汽压时,煤气中的粗苯即被洗油吸收。A、大于B、小于...
Tuesday, May 9, 2023
Thursday, April 13, 2023
Wednesday, April 26, 2023
问题:洗油中甲基萘含量高,洗油粘度小,平均分子质量小,吸收苯的能力大。...
Sunday, April 28, 2024
问题:大气一次污染物是指直接从污染源排放到大气中的有害物质。最常见的一次污染物有()、()、()及颗粒物。...
Saturday, May 6, 2023
Friday, September 29, 2023
Wednesday, December 6, 2023
问题:管式炉的辐射管是耐热钢管沿圆筒体的炉墙内壁周围()向排列。...
Wednesday, July 12, 2023
Wednesday, April 26, 2023
问题:从焦炉煤气中回收苯族烃的方法中,我国普遍采用()。...
Saturday, September 10, 2022
Monday, March 11, 2024
问题:生产每吨180℃前粗苯所消耗的煤气量为()标米3。A、300~400B、450~550C、500~600...
Thursday, February 29, 2024
Thursday, February 1, 2024
Wednesday, December 6, 2023
Monday, November 20, 2023