The brain receives information from the outside world through the sensory (感覺的) system．This information is collected through the eyes，the nose，the ears，the mouth and the surface of the body．It is then kept in the memory．In fact，scientists do not completely understand how the memory works but they are not sure how much information that the human brain can store．Also， it appears that the information is never lost．Very old people often remember things that happened in their childhood which have not come to their minds for sixty to seventy years．If we have kept something in our memory, it is here．But can we get it out again and use it? That is the difficulty．

Some of the information we receive only goes into the Short Term Memory．We only keep this information for a minute or two，then we lose it．This temporary (暫時的) memory is very important in our thinking and understanding．It is used，for example，when you try to remember a name that someone told you a moment ago or a telephone number that you are going to dial (撥)．School children in class often seem to use the Short Term Memory if they are not interested in the subject．When school teachers describe this，they say that things go“in one ear and out in the other”．But if a child is interested，he puts the information in his Long Term Memory, and he never loses it．Long Term Memory depends heavily on our understanding of the meaning of the information we receive．

1.Information is collected through the of sight，hearing，smell，taste and touch．

A．sense B．experience

C．practice D．brightness

2.Very old people can remember something happened ．

A．recently B．a(chǎn)bout seventy years ago

C．in their thirties D．in their classroom

3.If a school child is not interested in a subject， ．

A．he forgets what he learns quickly

B．he memorizes what he learns quickly

C．he forgets what he learns slowly

D．he memorizes what he learns slowly

4.The better we understand the meaning of the information， ．

A．the more information we can put in our Short Term Memory

B．the more information we can put in our Long Term Memory

C．the less information．we can put in our Short Term Memory

D．the less information we can put，in our Long Term Memory

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