问题 单项选择题

据英国每日邮报报道,科学家和心理学家长期以来一直未解开一个谜团——为什么我们会忘记童年发生的事情这是人生之中最无忧无虑、最快乐的时光。目前,两位科学家认为他们揭开了谜底。他们指出,生命初期大脑记忆中枢的细胞快速生长,这意味着早期存在的大脑记忆细胞之间的关键性连接将被更新替代,因此,人们童年时期的记忆就不太可能恢复。他们认为,这可以解释为为什么人类很少有对幼年时期的回忆。实际上,无法回忆起童年生活的细节也具有一定的好处,它能使人们不会经常回忆起婴儿时期发生的一些不愉快事件。   根据这段文字,童年回忆缺失的主要原因是:

A.大脑记忆细胞快速发育

B.记忆随时间而模糊消退

C.生命初期语言能力较低

D.儿童具有自我保护机制

答案

参考答案:A

解析:解析:由“他们指出,生命初期大脑记忆中枢的细胞快速生长,这意味着早期存在的大脑记忆细胞之间的关键性连接将被更新替代”可知,A项正确。

阅读理解

Everyone likes living in a clean and comfortable environment. If the envionment(环境) are bad, it will affect(影响)our body, and make us not feel well. Sometimes we may be terribly ill. At that time we don’t want to work, and we have to stay in bed and rest at home. So the envrionment is very important to us.

It’s germs that makes us ill. There are germs everywhere, They are very small and you can’t find them with your own eyes, but you can see them with a microscope(显微镜)They are very small and there may be hundreds of them on a very small thing, Germs can always be found in dirty water. When we look at dirty water under the microscope, we shall see them in it. Germs can also be found in air and dust(灰尘). If you cut your finger, some of the dust from the floor may go into it, and you will have much pain in it. Sometimes the germs will go into all of your boby, and you will have pain everywhere.

To keep us healthy, we should try to our best to make our environment become cleaner and tidier. This needs us to act together.

小题1:The writer tell us that________.

A.we like working when we are ill

B.germs can’t live in the water.

C.we can’t feel ill if the environment is bad.

D.we feel well when the environment is good.小题2:Germs are________.

A.very small things that you can’t see with your eyes.

B.the things that don’t effect people.

C.the things that you can find with your eyes.

D.the things that are very big.小题3:Where can germs be found? They can be found_________.

A.on the small thing

B.in air and dust

C.only in dirty water

D.everywhere小题4:How will you feel if germs go into the finger that is cut?

A.I will feel nothing.

B.I won’t mind.

C.I will feel tense.

D.I will feel painful.小题5: From the passage we know that________.

A.environment doesn’t affect our life

B.we don’t need to improve our environment

C.germs may make us ill

D.if the environment is better, germs will be more.

单项选择题 A1/A2型题