历年英语四级考试作文

历年英语四级考试精选作文

　　The Brain and the Computer

　　Some recent developments in the computer industry make scientists predict that the gap between human beings and machines will be closed about the year

　　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 a 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.

　　However, the computer consumes 1000,000 watts of electrical power and occupies hundreds of cubic feet of space. Its million items of immediately accessible information. In contrast, the computer memory is like a cell of pigeonholes, with no thinking capacity and no connections elsewhere.

　　In a word, the electronic brains are hopelessly inadequate in comparison with the human brains.

【历年英语四级考试作文】相关文章：

英语四级阅读考试技巧11-26

大学英语四级考试技巧09-16

大学英语四级考试作文练习10-22

大学英语四级考试作文范文10-22

英语四级阅读考试的应试技巧11-27

大学英语四级考试写作攻略11-27

英语四级阅读考试的高分技巧11-27

大学英语四级考试的翻译方法11-27

英语四级考试作文常见替换词10-22

大学英语四级考试提分的方法11-27