四級暑期天天練：寫作必備范文（12）
·新東方名師點評改錯及其應試策略
·名師指導四六級復習：六級改錯備考公式
·名師考前指導四六級完型填空做題技巧
·免費試聽四六級名師輔導課程
12. 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 20000.
周雷：如何做到四六級英語與考研同步復習
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.
相關鏈接：
·六級考試快速閱讀實戰練習
·2009年6月四六級考前整體戰略
·09年6月四六級考前必看范文
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