解放军文职招聘考试手

Why are there more right-handed people than left-handed ones? Scientists now know that a person’s two hands each have their own jobs. For most people, the hand is used to find things or hold things. The right hand is used to work with things. This is because of the different work of the two sides of the brain. The right side of the brain, which makes a person’s hands and eyes work together, controls the left hand. The left-side of the brain, which controls the right hand, is the centre for thinking and doing problems. These findings show that more artists should be left-handed, and studies have found that left-handedness is twice as common among artists as among people in other jobs.

No one really knows what makes a person become right-handed instead of left-handed. Scientists have found that almost 40% of the people become left-handed because their main brain is damaged when they are born. However, this doesn’t happen to everyone, so scientists guess there must be another reason why people become left-handed. One idea is that people usually get right-handed from their parents. If a person does not receive the gene(基因) for right-handedness, he / she may become either right-handed or left-handed according to the chance and the people they work or live with.

Though right-handedness is more common than left-handedness, people no longer think left-handed people are strange or unusual. A long time ago, left-handed children were made to use their right hands like other children, but today they don’t have to.

1. After studying works of art made at different times in history, the scientists found _______.

A. the art began from 1,500 B.C.

B. the works of art ended in the 1950s

C. most people shown in the works of art are right-handed

D. most people shown in the works of art are left-handed

2. How many people in the world are left-handed now?

A. Less than one sixth. B. More than a half.

C. About 40%. D. The passage doesn’t tell us.

3. What is the hand for most people used to do?

A. It’s used to find or hold things.

B. It’s used to work with things.

C. It’s used to make a person’s eyes work together.

D. It’s the centre for thinking and doing problems.

4. According to the passage, which of the following is NOT true?

A. No one really knows what makes a person become right-handed.

B. Left-handedness is cleverer than right-handedness.

C. Today children are not made to use their right hands only.

D. Scientists think there must be some reason why people become left-handed.

5. The best title for this passage is _______.

A. Scientists’ New Inventions B. Left-handed People

C. Which Hand D. Different Brains, Different Hands 

【答案与解析】本文主要说明了为什么有的人习惯用右手，有的人习惯用左手。

1. C。细节题。在第1段中我们可找到这样的句子…Most of the people shown in these works are right-handed，所以答案是 C。

2. A。细节题。根据句子 Today, only about 10% to 15% of the world’s population is left-handed 我们可知现在世界人口中有10%—15%的人是 left-handed，那么与此数接近的应该是 less than one sixth(不到六分之一)。

3. A。细节题。根据文章第2段第3句可知对大多数人而言，手用来 find or hold things。

4. B。判断题。根据文章内容，惯用左手的人比惯用右手的人聪明是没有依据的。

5. C。主旨题。文章告诉我们：有些人习惯用右手做事，有的人习惯用左手做事， 而这种差异到底是怎样产生的呢？没有知道真正的原因，所以选 C。