听力原文及答案Unit11Left

1、Unit 11 Left-ha nded nessWhy Are Some People Left-ha nded?a. relating to the activity of the mind or brain精神的；脑力Part BListe ningTasksPassage 1Word Bankmen taladoptin volveme nt iden tical birth pareoneandtsopted pare nts one iden tical twins twinsPrince CharlesPrince Williamv. to take some one else

2、s child into one s family and make it legally one s own child 收养n. participation 卷入；牵连a. exactly the same 完全相同的s biological parents 亲生父母s non-biological pare nts 养父母developed from the same egg and therefore almost alwaysof the same sex and very much alike in appeara同卵双生子nee（英）查尔斯王子（英）威廉王子Script:Rese

3、arch has show n that 90% of people n aturally use their right hands for most tasks. But hun dreds of milli ons of people use their left han ds. Then why are some people left-ha nded? Scie ntists have bee n trying to an swer that questio n for many years. A study done in 1992 found that men are more

4、likely to be left-handed than women. It also found that Asian or Hispanic people are less likely to be left-handed than white people, black people, or North American Indians. Some cultures accept people who do things mostly with their left han ds. Others do not.Scie ntists want to know the reas on f

5、or left-ha nded ness because it is closely lin ked to men tal problems and Ian guage difficulties. One idea about the cause of left-handedness is the genetic theory. It says that people are right- or left-handed because of genes passed to them by their pare nts. For example, it has bee n show n that

6、 the handedness of adopted children is more likely to follow that of their birth pare nts tha n their adopted pare nts. Other evide nee of gen etic in volveme nt can be found in some families. One famous example is the left-handedmembers of the presentBritish royal family. These in clude Quee n Eliz

7、abeth II, Prince Charles and Prince William.Another idea is that right-handed people are born with the gene for it. But about 20%of people do not have the right-handed gene. These people could be either left- or right-ha nded. This idea may expla in why two babies who have the same genes use differe

8、 nt han ds. In 18% of ide ntical twins one twin is right-ha nded,and the otheris left-handed. Probably both twins lack the right-handedgene so each has a chaneeto be either right- or left-ha nded.Somescie ntists believe that the cause of han ded ness could in elude both gen etics and developme nt.Ex

9、ercise 1Listen to the passage and choose the right answers to the questions you hear.What is the passage mainly about?Causes of left-ha nded ness and right-ha nded ness.Two scie ntific expla nati ons of the cause of left-ha nded ness.Genes for left-ha nded ness.Men tal problems of left-ha nded peopl

10、e.Which of the follow ing topics is discussed in more detail in the passage?Handedness and the genetic theory.Ide ntical twins.Birth pare nts and adopted pare nts.Famous left-ha nded people in the world.What con clusi on can you draw from the passage?Right-ha nded people are superior to left-ha nded

11、 people.Right-ha nded ness is determ ined gen etically, but left-ha nded ness is learnt.About 18% of ide ntical twins are left-ha nded.Scientists have not yet reached agreement on the causes of left-ha nded ness.Exercise 2Liste n to the passage aga in and complete the follow ing sentences with the m

12、iss ing in formati on.A study done in 1992 found that men are more likely to be left-handed than women. It also found that Asia n or Hispa nic people are less likely to be left-handed tha n white people, black people or North America n In dia ns.Scien tists want to know the reas on for left-ha nded

13、ness because it is closely lin ked to mental problems and language difficulties.One idea about the cause of left-ha nded ness is the gen etic theory.Another idea is that right-handed people are born with the gene for it. But about 20% of people do not have the right-handed gene. They could be either

14、 left- o right-ha nded.5Somescientists believe that the cause of handedness could include both genetics and developme nt.Passage 2Does Being Left-handed Affect One s Life?Word Bankapproximately ad. nearly 大约issue significant frustration scissors utensil gearn. a point in question; a matter in disput

15、e 问题； 争论点important 重大的n. feelings of being disappointed and annoyed 沮丧v. to be organized in a way that is suitable for a particular purpose or situation 使适应；使适合不是用这种方法就是take for gran ted to accept sth. as true without questioning想当然n. a cutting device 剪刀（复数）n. a container or tool commonly for kitche

16、n use器皿amount to to be equal to, esp. in meaning意味着one way or another either of two possible ways; in any way用那种方法；用某种方法Script:There are approximately 30 million left-handed people in the United States, and several hundred million more around the world. Most right-handed people have never even consi

17、dered the possibility that there might be any serious issues affecting left-handers. Even among all of these left-handed people, there are many different opinions about what these issues are and which issues might be most important to them.Some left-handers think that being left-handed is a positive

18、 factor in their lives, and they feel that there are no serious issues affecting them. Others think that being left-handed is not a significant factor and has not affected their lives one way or another. There are also some left-handers who have no opinion and have never given any thought to what be

19、ing left-handed has meant to them. But the majority of left-handed people find that being left-handed is at least a small disadvantage and a minor source of frustration in their lives.There are many things that right-handed people take for granted that are quite difficult for lefthanders. These incl

20、ude many basic skills like learning to write, learning to use scissors and other hand tools and utensils, and learning various crafts and other activities. Sometimes left-handers are puzzled by equipment designed for right-handers, and other times they are confused by instructors and instructions ge

21、ared toward teaching right-handers. For some left-handedpeople thisamounts to occasional difficulties and minor inconveniences. For other left-handers it is a lifetime full of failures and frustrations that may lead to much more serious problems.Exercise 1Listen to the passage and choose the right a

22、nswers to the questions you hear.1. What is the speaker s attitude toward left-handers?Indifferent.Neutral.Favorable.2.Sympathetic.What can be in ferred from the passage about right-ha nders? a. Most of them are sympathetic to left-ha nders.Most of them are indifferent to the problems left-handers f

23、ace.Most of them con sider themselves lucky to be right-ha nded.Most of them are un aware of the problems left-ha nders face.Exercise 2Liste n aga in and supply the miss ing in formati on in the tables below.To some left-ha ndersTo other left-ha ndersTo the majority of left-ha ndersHow Left-ha nders

24、 Feel About Their Bei ng Left-ha ndedIt is a positive factor in their lives.There are no serious issues affect ing them.It is not a significant factor.It has not affected their lives.It is at least a small disadvantage and a minor source of frustrati on in their lives.What may be difficult for left-

25、ha nders? Basic skills like lear ning to write, learni ng to use scissors and other hand tools and utensils, and learning various crafts and otheractivitiesWhat may con fuse left-ha nders?Equipme nt desig ned for right-ha nders; in structors and in struct ions geared toward teach ing right-ha ndersP

26、art CTest Your Liste ningA Compo und Dictati onListen to the passage three times and supply the missing information.Approximately 90%of people in the world are 1) naturally right-handed. Why is this so, and are we 2) born one way or the other? The answer to this question is rather 3) complicated.In babies and young children, no 4) single side becomes 5) dominant until around the age of eight. At 12 weeks, babies usually use both hands 6) equally, but by 16 weeks, they mostly use the left hand for 7) touching. By 24 weeks, they have changed aga in and start