cet4作文怎么写（CET-4段首句作文Computers）

Computers

Directions: For this part, you are allowed 30 minutes to write a composition in three paragraphs. You are given the first sentence of each paragraph. Your part of the composition should be on less than 120 words, not including the words given.

Computers

Computers don’t look like anything we use in daily life.——————————————

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Unlike people, computers don’t need coffee break, sick leaves or vacation.—————

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But computers can’t think for themselves now.——————————————————

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【范文】

Computers

Computers don’t look like anything we use in daily life. And sometimes they occupy① a great deal of② space and time. Although they have their own style and ways to operate, they are very useful and helpful to human beings.

Unlike people, computers don’t need coffee break, sick leaves or vacation. A computer can work continuously or continually throughout a day, a week or a month, and never goes on strike③ unless the power supply④ is switched off⑤ or the chip breaks down. In short⑥, it doesn’t feel tired and the productivity is very high. We can use it to process data to programme, calculate, and even do whatever it can.

But, computers can’t think for themselves now. Although sometimes we say the computers are intelligent and once during the chess they can beat the human beings, they can’t reach the same level of thinking like mankind. They can only deal with⑦ the things that have been programmed or instructed by humans. And they have no emotions. After all, a computer is just a kind of tool with which for us to accomplish⑧ some complex work.

【注释】

①occupy：占据；占用

②a great deal of：（常接不可数名词）许多，大量

③go on strike：举行罢工

④power supply：供电

⑤switch off：关掉，切断

⑥in short：简单地说，总而言之

⑦deal with：解决，对付

⑧accomplish：完成，解决

【点评】

这是一篇根据段首句展开的议论文。本篇作文的论题是“Computers”，即对计算机进行论述，而论述的重点放在计算机的特征上。文章分为三段，三段不仅各自自成体系，而且又统一归纳到“计算机的特征”这一要点底下。

第一段先写计算机的“特殊性”，即计算机不同于一般的日常生活用品，虽然它既占据空间和时间，但对人类却非常有用。第二段写出计算机的“独特性”，这一特征可以通过与人类比较后得出。除非电源坏了或芯片坏了，计算机可以连续工作，并且效率很高。我们可以利用它干许多事情。第三段指出它的“缺点”，可通过和人类比较后得出：计算机不能像人类一样“思考”，最终要由人类来控制。

文章的结尾通过写出计算机的本质特征即“a kind of tool”来照应全文，并将其“特殊性”、“独特性”等特征归纳于标题之下，统领全文。

参考文献：英语作文高分必背丛书：大学英语四级写作/李华田主编，武汉大学出版社，2005