Ⅱ.七选五

　　Why Do We Forget Things?

　　When it comes to having perfect memories,it is apparent that we humans must have had some faults in our blueprints!Why don’t we remember everything that we want to remember?It makes us feel upset and get discouraged.　1　 However,it’s true that we are all forgetful. 

　　　2　 These are stored in what we call our “long-term memory”.What about before age three?Sigmund Freud,a doctor of Vienna,discovered the fact that we forget most of our early childhood.　3　 They have different opinions.A very good theory,born from the results of experimentation with babies,is that absence of language ability at the time of an event stopped us from describing it to others. 

　　　4　 Experts say that you can keep about seven things in your memory at once for up to three days.During that time,you may forget something in order to put something else in its place,or you put it into long-term memory.What goes into short-term memory are things you’ve learned about recently,in the past day or two.　5　 For example,you may have met your favorite star last week,and this week you can tell all the details to a friend.A simple example to explain your short-term memory is to look at a list of twenty words for a minute or two.You will discover that you cannot remember more than about seven of them and that they are the ones in the beginning and at the end of the list because your mind has judged them to be more important than those in the middle. 

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