12.Most people around the world are right-handed.This also seems to be true in history.In 1799,scientists studied works of art made at different times from 1,500B.C.to the 1950s.Most of the people shown in these works are right-handed,so the scientists guessed that right-handedness has always been common through history.Today,only about 10% to 15% of the world's population is left-handed.
Why are there more right-handed pople 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 finding 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.
32.After studying works of art made at different times in history,the scientists foundD.
A.the art began from 1,500B.C.
B.the works of art ended in the 1950s
C.most people shown in the works of art are left-handed
D.most people shown in the works of art are right-handed
33.What is the hand for most people used to do?B
A.It's used to work with things.
B.It's used to find or hold things.
C.It's used to make a person's eyes work together.
D.It's the centre for thinking and doing problems.
34.According to the passage,which of the following is NOT true?C
A.No one really knows what makes a person become right-handed.
B.Today children are not made to use their right hands only.
C.Left-handedness is cleverer than right-handedness.
D.Scientists think there must be some reason why people become left-handed.
35.The best title for this passage isA.
A.Which Hand
B.Left-handed People
C.Scientists'New Inventions
D.Different Brains,Different Hands.
分析 本文主要討論的是左撇子還是使用右手的話題,從古到今,從科學到一般的看法,作者都做了詳細地闡述.
解答 66.D.細節(jié)理解題.根據(jù)In 1799,scientists studied works of art made at different times from 1,500 B.C.to the 1950s.Most of the people shown in these works are right-handed.可知在1799年,科學家們研究藝術(shù)在不同時期,從公元前1500年創(chuàng)作的作品到20世紀50年代.在這些作品中的大部分人是右撇子.故選D.
68.B.細節(jié)鄰居題.根據(jù)For most people,the left hand is used to find things or hold things.可知對于大多數(shù)人來說,左手是用來尋找東西或拿東西..故選B.
69.C.細節(jié)理解題.根據(jù)文章第3段No one really knows what makes a person become right-handed instead of left-handed.可知沒有人真正知道是什么讓一個人常用右手而不是左手,說明A正確,A long time ago,left-handed children were made to use their right hands like other children,but today they don't have to.可知很久很久以前,左撇子兒童想自己的右手像其他孩子一樣,但今天他們不需要,說明B正確.so scientists guess there must be another reason why people become left-handed.可知,因此科學家想之所以會變成左手一定有另一個原因.說明D正確.唯獨文章沒有提到左撇子比使用右手的人更聰明,故C項Left-handedness is cleverer than right-handedness錯誤.故選C.
70.A.主旨大意題.根據(jù)Most people around the world are right-handed及下文,可知本文主要討論的是左撇子還是使用右手的話題,從古到今,作者都做了詳細地闡述.故A項正確.故選A.
點評 本文是一個科教類閱讀理解,題目涉及多道細節(jié)理解題,做題時結(jié)合原文和題目有針對性的找出相關語句進行仔細分析,結(jié)合選項選出正確答案.推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).