题目内容
在室温下，甲苯与浓硫酸作用，生成约95%的邻和对甲苯磺酸的混合物。但在150~200 °C较长时间反应，则生成间位(主要产物)和对位的混合物。试解释之(提示:间甲苯磺酸是最稳定的异构体)。
查看答案
搜索结果不匹配？点我反馈
更多问题
下列哪个反应是不可逆的（ ）
Complete the dialogue by arranging the given sentences in the right places.C: Good morning!P: 1.______________________________C: Yes, passport, please.P: 2. ___________________________C: Sure. 3._____________________________P: Two bags to check in. One carry-on .C: OK. 4. ____________________________P: All right. 5.___________________________C: 30kgs for check -in. 5kgs for carry-on.C: Here is your boarding pass and baggage check, have a good flight.
2.6 进阶-完成对话-中译英Dialogue 1C： Good morning. 1. ______________________________， please(请出示您的机票和身份证。）P: Here you are.C: 2.____________________________________________(请您把您的行李放到秤上。）P : Is that within the free allowance?C:Yes.P: By the way, can I take this laptop as my hand baggage?C: That's all right. .3 _______________________________ （请问您需要什么样的座位。）P: Window seat.C: I'm sorry. 4. ______________________________ (靠窗的座位已满了。）Will the aisle seat be all right?P: It's OK.C: Your ticket and ID Card, and 5.________________________________________(这是您的登机牌和行李牌。）
2.6-进阶-完成对话-中译英Dialogue 2P: It is the counter of Air China, isn't it ?C: Yes, 1. _____________________________________?(有什么为您效劳的吗？）P: I'm going to check in for flight CA925 . 2._________________________________________( 我现在能办理登机手续吗？）C: Yes, just right now. 3.________________________________________________________________ (飞机于九点半起飞）， that is to say, it will depart from the Capital Airport in 35 minutes.P: Oh, am I too late?C: No, not too late. But you should go to Gate 2 quickly after check-in. Most of the passenger have already boarded the plane. 4.___________________________________________( 请出示您的机票和护照。）P: Here you are.C: OK. 5. __________________________________ (有要托运的行李吗？）P: Yes， suitcase.C: OK. 6.__________________________________________ (这是您的机票，护照和登机牌。）A happy journey to you.P: Thanks a lot.
微信支付 
支付宝支付