问题 填空题

化学学习中经常需要进行对比. 归纳与整理。请对以下三个实验中所发生的化学反应现象及化学反应原理进行总结归纳:

(1)盛装氧气的仪器名称是__________________。

(2)任意写出一个发生的化学反应方程式_______________。

(3)分析所发生的三个反应,它们有多个共同特点,如它们有共同的反应现象__________,请再写出其中另外两点。 ①______________; ②________________。

答案

(1)集气瓶

(2)O2 + SSO2(或5O2 +4P2P2O5 或 2O2 + 3FeFe3O4

(3)燃烧;

都属于化合反应,反应条件都需要点燃或都有氧气参加反应或反应都有热量放出或都是固体与气体反应等(答出两点即可)

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。

I had an experience once which taught me something about the ways people made a bad situation worse by blaming themselves. One January, I officiated(主持) at two funerals for two elderly women. 小题1:. At the first home, the son of the deceased(已故) woman said, “If only I had sent my mother to Florida and gotten her out of this cold and snow, she would be alive today. It’s my fault that she died.” At the second home, the son said, “If only I had not insisted her going to Florida, she would be alive today.  小题2: . It is my fault.”

When things don’t turn out as we would like them to, we tend to assume that had we done things differently, the story would have had a happier ending. Any time there is a death, the survivors will feel guilty. Because the course of action they took turned out bad, they believe that the opposite course, for example, keeping mother at home, would have turned out better.     小题3: 

There seem to be elements involved in our readiness to feel guilty. The first lies in our belief that the world makes sense---there is a reason for everything that happens. 

The second is the thought that we are the cause of what happens, especially the bad things that happen.小题4:. A baby comes to think that the world exists to meet his needs, and that he makes everything happen in it. He wakes up in the morning and calls the rest of the world to its tasks.小题5: . When he is hungry, people feed him, and when he is wet, people change him. Very often, we do not completely abandon that childish thought that our wishes cause things to happen.

A.That long airplane ride was more than she could take

B.After all, how could it have turned out any worse?

C.Life and dead is an unsolved mystery.

D.The roots of this feeling may lie in our childhoodE.He cries, and someone comes to attend to him

F.Both died a natural death

G. They believe that they are responsible for what has happened.

单项选择题