问题 问答题 简答题

在组装或维修计算机时,静电会产生什么样的后果?如何清除静电?

答案

参考答案:在组装或维修计算机时,人与计算机内部部件的接触是在所难免的,其相互接触的部位很容易就会积累大量的静电荷。这种静电荷可以造成程序中断执行,磁盘读/写错误,存储器数据丢失,芯片、电阻器件击穿与破坏甚至造成整机工作的瘫痪。因此,在组装或维修计算机前,先消除人身体上的静电,防止人体所带静电对电子器件造成损伤,有条件的可带防静电手套,没防静电手套的可用手触摸水管等接地金属物体。

单项选择题

Generally speaking, a British is widely regarded as a quiet, shy and conservative person who is (1) only among those with whom he is acquainted. When a stranger is at present, he often seems nervous, even (2) . You have to take a commuter train any morning or evening to (3) the truth of this.

Serious-looking businessmen and women sit reading their newspapers or dozing in a corner; hardly anybody talks, since to do so would be considered quite (4) .

(5) , there is an unwritten but clearly understood code of behavior which, once broken, makes the offender immediately the object of (6) .

It has been known as a fact that a British has a (7) for the discussion of their weather and that, if given a chance, he will talk about it (8) .

Some people argue that it is because the British weather seldom (9) forecast and hence becomes a source of interest and (10) to everyone.

This may be so. (11) a British cannot have much (12) in the weathermen, who, after promising fine, sunny weather for the following day, are often proved wrong (13) a cloud over the Atlantic brings rainy weather to all districts! The man in the street seems to be as accurate — or as inaccurate — as the weathermen in his (14) .

Foreigners may be surprised at the number of references (15) weather that the British (16) to each other in the course of a single day. Very often conversational greetings are (17) by comments on the weather. “Nice day, isn’t it” “Beautiful!” may well be heard instead of “Good morning, how are you” Although the foreigner may consider this exaggerated and comic, it is (18) .pointing out that it could be used to his advantage. If he wants to start a conversation with a British but is at a loss to know (19) to begin, he could do well to mention the state of the weather. It is a safe subject which will (20) an answer from even the most reserved of the British.

18()

A.reasonable

B.useful

C.worthwhile

D.meaningful

解答题