以人脑和电脑为题的下半年四级作文范文
Directions: Write a composition entitled The Brain and the Computer. You should write at least 120 words according to the outline given below in Chinese:
有人认为预测电脑的`功能将超过人脑。请就人脑与电脑的区别写一 篇作文，你可以从体积、运算速度和结构等方面进行对比。
参考范文：
The Brain and the Computer
Some recent developments in computer industry make scientists predict that the gap between human beings and the machine will be closed by the year 20000. To understand the significance of this prediction, let us compare the human brain with existing computers. The brain consumes electrical energy at the rate of 25 watts and occupies volume of one tenth of a cubic foot. The brain houses between 10 billion and 100 billion items of information. Every brain cell is directly connected to many other cells. As a result, the cells in which information is stored can communicate with thousands of other cells. Incontrast,jhe^computer^consu;mes_1000,000wwattsofelectricaLpower^and occupieshundredsofcubicJ:eeLofspace.^rhe^computermemoryjisJlike^acell of pigeonholes^withnojhinking^capacityandnoconnectionselsewhere. In a word, thejel^ctronicbrainsjcanjhopelesslysucceedJinjcomgarison with the human brains.
【词汇表达亮点】
predict v.预测，预言
cubic foot立方尺
gap n.差互巨大
house v.容纳
close v.消失，结束
communicate with ... 与? ?交流，沟通
significance n.重要性 意义
compare ... with ...把 和 in contrast 相比较 进行比较
pigeonhole n.分类架
consume v.消耗
in a word总之，简言之
at the rate of ...以 的速度
in comparison with ... 与? ??比较，同??比较起来
occupy volume of . 占据 的体积
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