Question

【题目】阅读下列短文 ，从每题所给的四个选项 （A 、B 、C 和 D ）中 ，选出最佳选项。

Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country's bees. He imported a very active type of African bee from Tanzania and mated (交配) it with the more easy-going native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.

Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings (叮) , began to attack its neighbors -- cats, dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

This would have been bad enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

【1】The results of the South American experiment .

A. have caused a serious trouble

B. have proved to be wrong

C. are highly thought of

D. are not yet certain

【2】The experiment mentioned in this passage was designed to .

A. increase the amount of honey in Brazil

B. make Brazilian bees more easy-going

C. increase the number of bees in Brazil

D. make African bees less active

【3】Which of the following may be the cause of the new bees' attacking personalities?

A. Their production of honey. B. Their hard work.

C. Their living environment. D. Their bad temper.

【4】The last paragraph implies that .

A. the bees have been driven to Central and North America

B. the bees may bring about trouble in more countries

C. the bees must be stopped from moving north

D. the bees prefer to live in Brazil

Answer 1

【答案】

【1】D

【2】A

【3】C

【4】B

【解析】

试题分析：科学实验的结果给人类带来的影响有好有坏，很难做出评价。文章中列举南美洲的新型蜜蜂的例子来证明这一点。

【1】D 推理判断题。根据第一段后两句One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.可知50年前在南美洲进行的这一个实验的结果还有待于进一步观察。也就是说还没有确定。故D项正确。

【2】A 推理判断题。根据第二段后两句The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.可知这种新型的蜜蜂的产蜜的量较多，似乎这个实验很成功。说明这个实验的目的就是增加蜜蜂的产蜜的量。故A正确。

【3】C 细节理解题。根据第三段第二句For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities.可知这种蜜蜂的极端性格可能是由于环境的原因。故C项正确。

【4】B 推理判断题。根据最后一段第二句But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year.可知这种蜜蜂正在向北部迁移，而且速度较快。也许更多的国家会受到影响。