问题
填空题
精馏塔主要用途是经初馏、酸洗、吹苯后的（）再精馏塔内进行蒸馏，提取（）。
答案
参考答案：混合分；纯产品
搜题请搜索小程序“爱下问搜题”
精馏塔主要用途是经初馏、酸洗、吹苯后的（）再精馏塔内进行蒸馏，提取（）。
参考答案：混合分；纯产品
| 选择合适的句子完成对话。 | |
B: 1_____________ You may ask that policeman over there. A: Thank you all the same. (The man goes to the policeman.) A: Excuse me. 2_____________ C: No, there isn't a hotel near here, but there is one near the Bank of China. A: 3_____________ C: It's about two kilometers (公里) away. A: 4_____________ C: You'd better take a taxi, because it's so late. There aren't any buses now. A: 5_____________ C: You' re welcome. |