Whether a person is right-handed or left-handed results from________. [originalt

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问题 Whether a person is right-handed or left-handed results from________.
Some people are right-handed and some are left-handed. No one knows the reason why a person becomes right-handed or left-handed. (11) It is not true that it is caused by the way in which his parents educate him. In other words, a person is born to be right-handed or left-handed. Moreover, the left-handed and the right-handed "think" differently. Having to use the hand you’re not used to can be very upsetting.
    One day I tried an experiment: changing hands while eating rice with chopsticks. Being a right-hander, I hoped it would not be too hard for me to take the food with my left hand. Soon after I started, I realized I didn’t know what I was doing. (12)So I moved in front of a big mirror, in order that I could observe my actions clearly. (13) Looking at myself in the mirror, I found I looked like a man who had never used chopsticks. I grew more and more nervous and finally I had to give it up.
    My experience shows, being forced to use the hand one is not used to affects a person’s mind. So we should not try to change a left-hander to a right-hander. Some people still think being left-handed is bad, but luckily this idea is changing.

选项 A、the education of the parents
B、the education of the teacher
C、genetic factors
D、the example of the friends

答案 C

解析 细节题。短文开头说到没人知道为什么人分左撇子和右撇子,说是由父母的教育方式造成的是不对的。换句话来说,人一生下来就已经决定是左撇子还是右撇子了,即决定人是左撇子还是右撇子的是自身的基因造成的,C为正确答案。
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