问题 推断题

四川汶川盛产品质优良的甜樱桃。甜樱桃中含有一种羟基酸(用A表示),A的碳链结构无支链,化学式为C4H6O5;1.34 g A与足量的碳酸氢钠溶液反应,生成标准状况下的气体0. 448 L。A在一定条件下可发生如下转化:

其中B、C、D、E分别代表一种直链有机物,它们的碳原子数相等。E的化学式为 C4H6O6(转化过程中生成的其他产物略去)。已知:

(X代表卤原子,R代表烃基)

A的合成方法如下:

其中,F、G、M分别代表一种有机物。

请回答下列问题:

(1)A的结构简式是_______________。

(2)C生成D的化学方程式是__________________________ 。

(3)A与乙醇之间发生分子间脱水反应,可能生成的有机物共有_________ 种。

(4)F的结构简式是_________________。

(5)写出G与水反应生成A和M的化学方程式:___________________________________。

答案

(1)

(2)

(3)7

(4)

(5)

完形填空
It’s never too late to right your wrongs, big or small.
Working as hard as I had been over the years, I had become disconnected from(失去联系的)the people who mattered most to me. I decided to spend a year reconnecting with my friends and relatives and making amends(补偿). I devoted myself to caring for what I called “my unfinished business”, which has helped me become a more attentive husband, father, son and friend —and a happier, more energetic person.
Now that I’ve had a good opportunity to revisit my past mistakes—and experience the rewards of fixing them—I’d like to share some of the lessons I have learned:
Have you lost touch with people who were important to you? Are there things you’ve done or not done that are in front of you? Are there people in your life you don’t know how much they meant to you? List your unfinished business and take action to deal with it.
Instead of trying to put an end to the cold war dividing your family, begin with a small thing you can control. Apologize to your brother for not attending his Super Bowl party. Respond to an e-mail you should have answered a week ago. Write a note or make a call.
No matter what the wrong is, the most important thing in making it right is your sincerity. If you reach out with a genuine (真诚的)heart, your friends will be glad to hear from you again.
This is the key to learning and growing. Keep a journal, or summarize what you’ve learned in e-mails to friends. The difficulty we face in dealing with our unfinished business can seem impossibly big, but the first step to clearing them can be simple: Again, write a note or make a phone call .Once you discover your fears and get over them, you’ll become a more complete and pleased person.
Topic: 1 ______too late to right your wrongs
Introduction
Have you been disconnected from the people who mattered most to you just because of your hard 2__________?
Here are some of the 3__________ I have learned.
 
4__________
Think back to your life
Make a list of the things you need to do in order to 5__________with friends and relatives.
The time has come for 6__________if you want to deal with the unfinished business.
Start small
Begin with small things so that you can keep them in 7__________.
Be sincere
Sincerity is the 8__________ to improving the relationship. To get in 9__________ with your friends again, you should reach out with your true heart.
Reflect on your experience
To clear the problems, the first step is simply 10__________ a note or making a phone call.
多项选择题