问题 填空题

昆虫能分泌信息素。下列是一种信息素的结构简式:CH3(CH2)5CH=CH(CH2)9CHO。写出该物质中官能团名称,为官能团提供一种简单的鉴别方法并简述实验现象,写出与鉴别方法有关的化学方程式并指出反应类别,完成下表(可不填满)。

官能团鉴别方法及实验现象有关反应的化学方程式反应类别
    
    
    
 

答案

官能团鉴别方法及实验现象有关反应的化学方程式反应类别
(醛基)先加足量银氨溶液生成银镜CH3(CH2)5CH=CH(CH2)9CHO+2[Ag(NH2)2]+2OH→CH3(CH2)5CH=CH(CH2)9COO+NH4+2Ag+3NH3+H2O氧化反
(碳碳双键)加溴水溴水褪色CH3(CH2)5CH=CH(CH2)9CHO+Br2→CH3(CH2)5CHBr-CHBr(CH2)9CHO加成反应
 

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

__71___ .Being angry doesn’t really solve much, but what people do when they feel angry is important. The goal is to calm down and try to solve what is bothering you. This is hard for some kids and adults, too. Instead of calming down, some kids might keep getting more and more upset until they explode like a volcano!

_72__ .Their anger might be so strong that they lose control of their temper. They may act in ways unacceptable and hurtful. People may say that someone has trouble controlling their temper._73__

Some kids might get so angry that they scream at their parents, break something , or even worse , hit their brothers or sisters._74____ .However, it’s not OK for a kid to do any of those things .Kids don’t want to act in this way , but sometimes angry feelings can be hard to manage. So what to do?

Well, the good news is that kids don’t just have to keep making the same mistakes over and over again.__75__ .Imagine your temper as a puppy inside you that needs some training. The puppy is not bad ---- it will probably turn out a great dog. It just needs to learn some rules because, right now, that puppy is causing some problems to you.

A.You can train you temper.

B.You don’t want to cause trouble.

C.Kids should be allowed to express their feelings, even angry ones.

D.Everybody gets angry sometimes.E.In fact, they usually mean that a kid behaves badly when feeling angry.

F.Instead of thinking of the person you’re angry with, think of something else.

G.Some kids get angry more often or more easily than some other kids.

选择题