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.

【2016届高考英语二轮复习阅读理解一百四十集选练：（105）】相关文章：

★ 常熟市2014高考英阅读理解语一轮（暑假）训练题（1）及答案

★ 2014届高考英语一轮复习课时作业(十四)必修3Module 2《Developing and Developed Countries》（外研版）

★ 2017届高考英语二轮复习课时训练：3（含解析）

★ 2017年高考英语二轮复习精品资料：专题15 完形填空（教学案）（原卷版）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 2 A卷 Word版含解析

★ 2014届高考英语一轮复习必修2参考答案（外研版）

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修4 Unit 1《Advertising》

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（4）及答案

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (79)

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（34）附答案