英語作文大全

　　英語四級命題作文：人腦和電腦

　　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. In contrast, the computer consumes 1,000,000 watts of electrical power and occupies hundreds of cubic feet of space. The computer memory is like a cell of pigeonholes, with no thinking capacity and no connections elsewhere.

　　In a word, the electronic brains can hopelessly succeed in comparison with the human brains. (151 words)

標(biāo)簽：命題作文人腦電腦

熱門成語

• 枯木朽株  枯木頭，爛樹根。比喻衰朽的力量或衰老無用的人。
• 愧天怍人  怍：慚愧。對天對人，都感到慚愧。指做了虧心事無臉見人。
• 平治天下  平：平定；天下：指全中國。治理國家，使天下太平。
• 然荻讀書  然：“燃”的本字，燃燒；荻：蘆葦一類的植物。燃荻為燈，發(fā)奮讀書。形容勤學(xué)苦讀。
• 束手旁觀  猶袖手旁觀。比喻置身事外，不加過問。
• 宋畫吳冶  用以作為精巧神妙之物的代稱。
• 土階茅茨  比喻住房簡陋。同“土階茅屋”。
• 延頸鶴望  像鶴一樣伸長頸子盼望。比喻盼望心切。
• 至死不渝  至：到；渝：改變。到死都不改變。
• 諸如此例  許多像這樣的事例。
• 抓破臉皮  比喻感情破裂，公開爭吵。
• 黃發(fā)垂髫  黃發(fā)：老年人頭發(fā)由白轉(zhuǎn)黃；垂髫：古時單童子未冠者頭發(fā)下垂。指老人與兒童。
• 魯陽指日  同“ 魯陽揮戈 ”。 清 吾廬儒 《京華慷慨竹枝詞·電燈》：“大地茫茫日暮時， 魯陽 指日日仍馳?！?/span>