Anne Whitney, a sophomore at Colorado State University, first had a problem taking tests when she began college."I was always well prepared for my tests. Sometimes I studied for weeks before a test. Yet I would go in to take the test, only to find I could not answer the questions correctly. I would blank out because of nervousness and fear. I couldn't think of the answer. My low grades on the tests did not show what I knew to the teacher." Another student in biology had similar experiences. He said, "My first chemistry test was very difficult. Then, on the second test,
I sat down to take it, and I was so nervous that I was shaking. My hands were moving up and down so quickly that it was hard to hold my pencil. I knew the material and I knew the answers. Yet I couldn't even write them down! "
These two young students were experiencing something called test anxiety. Because a student worries and is uneasy about a test, his or her mind does not work as well as it usually does. The student cannot write or think clearly because of the extreme tension and nervousness. Although poor grades are often a result of poor study habits, sometimes test anxiety causes the low grades.
Recently, test anxiety has been recognized as a real problem, not just an excuse or a false explanation of lazy students.
Special university advising courses try to help students. In these courses, advisors try to help students by teaching them how to manage test anxiety. At some universities, students take tests to measure their anxiety. If the tests show their anxiety is high, the students can take short courses to help them deal with their tensions. These courses teach students how to relax their bodies. Students are trained to become calm in very tense situations. By controlling their nervousness, they can let their minds work at ease. Learned information then comes out without difficulty on a test.
An expert at the University of California explains: "With almost all students, relaxation and less stress are felt after taking our program. Most of them experience better control during their tests. Almost all have some improvement. With some, the improvement is very great."
A University of California advisor said__________.
A.all students could overcome the anxiety after taking a special test anxiety program
B.almost all students felt less stress after taking a University of California advising course
C.students found it difficult to improve even though they had taken a special test anxiety course
D.students found it easy to relax as soon as they entered a University of California advising course
答案：B
解析：
由最后一段“With almost all students，relaxation and less stress are felt after taking our program．"可知，几乎所有的学生，在参加过我们的项目之后，会变得更轻松，压力感减少。故选B。
请阅读短文。
Anne Whitney, a sophomore at Colorado State University, first had a problem taking tests when she began college. "I was always well prepared for my tests. Sometimes I studied for weeks before a test. Yet I would go in to take the test, only to find I could not answer the questions correctly. I would blank out because of nervousness and fear. I couldn't think of the answer. My low grades on the tests did not show what I knew to the teacher." Another student in biology had similar experiences. He said, "My first chemistry test was very difficult. Then, on the second test, I sat down to take it, and I was so nervous that I was shaking. My hands were moving up and down so quickly that it was hard to hold my pencil. I knew the material and I knew the answers. Yet I couldn't even write them down! "
These two young students were experiencing something called test anxiety. Because a student worries and is uneasy about a test, his or her mind does not work as well as it usually does. The student cannot write or think clearly because of the extreme tension and nervousness. Although poor grades are often a result of poor study habits, sometimes test anxiety causes the low grades. Recently, test anxiety has been recognized as a real problem, not just an excuse or a false explanation of lazy students.
Special university advising courses try to help students. In these courses, advisors try to help students by teaching them how to manage test anxiety. At some universities, students take tests to measure their anxiety. If the tests show their anxiety is high, the students can take short courses to help them deal with their tensions. These courses teach students how to relax their bodies. Students are trained to become calm in very tense situations. By controlling their nervousness, they can let their minds work at ease. Learned information then comes out without difficulty on a test.
An expert at the University of California explains: "With almost all students, relaxation and less stress are felt after taking our program. Most of them experience better control during their tests. Almost all have some improvement. With some, the improvement is very great."
Poor grades are usually the result of__________.
查看材料
A．poor sleeping habit
B．laziness
C．lack of sleep
D．inability to form good study habits
答案：D
解析：
由第二段“poor grades are often a result ofpoor study habits”可知，成绩差是不良的学习习惯造成的结果。故选D。
Anne Whitney, a sophomore at Colorado State University, first had a problem taking tests when she began college."I was always well prepared for my tests. Sometimes I studied for weeks before a test. Yet I would go in to take the test, only to find I could not answer the questions correctly. I would blank out because of nervousness and fear. I couldn't think of the answer. My low grades on the tests did not show what I knew to the teacher." Another student in biology had similar experiences. He said, "My first chemistry test was very difficult. Then, on the second test,
I sat down to take it, and I was so nervous that I was shaking. My hands were moving up and down so quickly that it was hard to hold my pencil. I knew the material and I knew the answers. Yet I couldn't even write them down! "
These two young students were experiencing something called test anxiety. Because a student worries and is uneasy about a test, his or her mind does not work as well as it usually does. The student cannot write or think clearly because of the extreme tension and nervousness. Although poor grades are often a result of poor study habits, sometimes test anxiety causes the low grades.
Recently, test anxiety has been recognized as a real problem, not just an excuse or a false explanation of lazy students.
Special university advising courses try to help students. In these courses, advisors try to help students by teaching them how to manage test anxiety. At some universities, students take tests to measure their anxiety. If the tests show their anxiety is high, the students can take short courses to help them deal with their tensions. These courses teach students how to relax their bodies. Students are trained to become calm in very tense situations. By controlling their nervousness, they can let their minds work at ease. Learned information then comes out without difficulty on a test.
An expert at the University of California explains: "With almost all students, relaxation and less stress are felt after taking our program. Most of them experience better control during their tests. Almost all have some improvement. With some, the improvement is very great."
Poor grades are usually the result of__________.
A.poor sleeping habit
B.laziness
C.lack of sleep
D.inability to form good study habits
答案：D
解析：
由第二段“poor grades are often a result of poor study habits”可知，成绩差是不良的学习习惯造成的结果。故选D。
Which of the following statements about teachers' instructions is NOT true?
A．Instructions should be simple and clear.
B．Instructions can be long and complicated for students to follow.
C．Teachers can use body language to assist students to understand.
D．Instructions should be kept to a minimum during activities.
答案：B
解析：
考查课堂教学中的教师指令语。教师的课堂指令语应简洁明了，这样学生才会明白；切忌长而复杂．这样不便于学生理解，也会影响教学的效率。教师在课堂上应尽量少用母语，必要时可以使用身体语言辅助学生理解。课堂指令语不应过多，教师应最大限度地发挥学生的主观能动性。故选B。
共用题干
Sleep Deficit
Judging from recent surveys,most experts in sleep behavior agree that there is virtually an epidemic（流行病）of sleepiness in the nation."I can't think of a single study that hasn't found Americans getting less sleep than they ought to,"says Dr.David.Even people who think they are sleeping enough would probably be better off with more rest.
The beginning of our sleep-deficit（睡眠不足）crisis can be traced to the invention of the light bulb a century ago.From diary entries and other personal accounts from the 18th and 19th centuries,sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night."The best sleep habits once were forced on us,when we had nothing to do in the evening down on the farm,and it was dark."By the 1950s and 1960s,that sleep schedule had been reduced dramatically,to between 7.5 and 8 hours,and most people had to wake up to an alarm clock."People cheat on their sleep,and they don't even realize they're doing it,"says Dr.David."They think they're okay because they can get by on 6.5 hours, when they really need 7.5,8 or even more to feel ideally vigorous."
Perhaps the most merciless robber of sleep,researchers say,is the complexity of the day.Whenever pressures from work,family,friends and community mount,many people consider sleep the least expensive item on his programme.In our society,you're considered dynamic if you say you only need 5;5 hours, sleep.If you've got to get 8.5 hours,people think you lack drive and ambition.
To determine the consequences of sleep deficit,researchers have put subjects through a set of psycho-logical and performance tests requiring them,for instance,to add columns of numbers or recall a passage read to them only minutes earlier."We've found that if you're in sleep deficit,performance suffers,"says Dr.David."Short-term memory is weakened,as arc abilities to make decisions and to concentrate."
The word"subjects"(Line 1,Para 4)refers to______.
A:the performance tests used in the study of sleep deficit
B:special branches of knowledge that are being studied
C:people whose behavior or reactions are being studied
D:the psychological consequences of sleep deficit
答案：C
解析：
文章第二段第一句说人们睡眠不足始于一个世纪前电灯的发明；第三句说良好的睡眠习惯是强加于人的，晚上天黑，无法在地里干活。由此可以推断出，C项符合文意。
在文章第二段倒数第二句David博士直接指出：人们在睡眠问题上自己欺骗自己，而且他们根本没有意识到这一点。由此可以推断出美国人经常忽略睡眠不足产生的后果，故选B。
文章第三段第二句话说：只要来自工作、家庭、朋友或社会的压力增加了，许多人就认为睡眠是最不重要的事情。A项“工作一忙，首先可以牺牲的是睡眠”符合文意。
本题考了一个熟悉的词、subject。它是一个多义词，可以表示“题目”“科目”等。但这些义项在这里都不合适。要确定它的意思，最关键的是要准确弄清它所在句子前后部分的意思和关系。这句话前一部分说，要确定睡眠不足引起的后果，研究人员让subjects通过一系列的心理和能力的测验，要求them将几栏数字加起来或回忆几分钟前所听到过的文章。所以，这里subjects指人，是“正在被研究的对象”。选项C是正确答案。
由文章第二段最后一句“…when they really need 7.5 , 8 or even more to feel ideally vigorous.和最后一段的研究结果“We've found that if you 're in sleep deficit , performance suffer…”可知，睡眠关系到人的精力和表现，故选D。
Part II Listening ComprehensionSection ANews Report One【话题预测】由 college students，sleep，problem，stress，psychological 等词可推断，本则新闻与大学生睡眠或心理健康有关。【正确答案】12 B D听力原文You probably think college students are experts at sleeping, but parties, preparations for tests, personal problems and general stress can wreck a students sleep habits, which can be bad for the body and the mind. Texas Tech University is even offering a class called “Improving Your Sleep Habits”. People suffering from sleep loss are at an increased risk from obesity, psychological problems and car crashes. Students who dont get enough sleep have poor attendance and lower grades. On top of all that, a new study published in the journal Learning and Memory finds you are probably better off sleeping than making last-minute preparations for a test. 200 college kids were taught to play some unfamiliar video games. Subjects who learned the games in the morning lost some skills when they played again 12 hours later, but they did much better after getting a good nights sleep. So if you really want to do your job well, dont forget to get some sleep.Questions 1 and 2 are based on the news report you have just heard.1. What is the news report mainly about?2. What is the finding of the new study published in the journal Learning and Memory?试题解析【话题分类】时事新闻【新闻大意】 大学生睡眠不好会严重影响学习效率和身心健康 ； Texas Tech 大学甚至开设课程教授学生改善睡眠习惯，提高睡眠质量 ； 新的一项研究也证明了提高睡眠质量的重要性。1. 【考核技能】概括总结B) 【答案解析】由 How，Why 及对应选项概述可判断，本题与新闻的主题相关 ；原文开始介绍睡眠不好对身心的不良影响 ： sleep habits, which can be bad for the body and mind ； 中间提到 you are probably better off sleeping than making last-minute preparations for your test（睡觉可能比做考前最后的准备更利于考试） ； 最后又强调 So if you really want to do your job well, dont forget to get some sleep（如果想做好自己的工作，不要忘记睡觉）； 由此可知，本则新闻主要介绍睡眠为何重要，所以本题选 B。2. 【考核技能】语义理解D)【答案解析】根据原文 ： a new study published in the journal Learning and Memory finds you are probably better sleeping than making last-minute preparations for your test（睡觉可能比做考前最后的准备更利于考试） ，由此可知本题选 D。News Report Two【话题预测】从选项中的 airports，built，investment，facilities，assets，offer better service 可知本篇新闻应该与机场及服务有关。【正确答案】34 C D听力原文Long queues, delayed flights and over-crowding at airports have become almost as much a topic for conversation in Britain as the traditional complaining about the weather. Meanwhile, there are complaints that poor service at Londons major airports is discouraging foreigners from doing business in Britain. Much of the criticism is directed at the British Airports Authority, which runs 7 major airports, including the 3 main ones serving London. The Competition Commission is now to investigate whether the British Airports Authority needs to sell off some of its assets. The idea is that、 competition between rival operators would lead to better service at airports. The British Airports Authority, recently bought by a Spanish company, says the root cause of the problem is not the ownership structure, but a lack of runway and terminal capacity, which is addressing through a program of、 heavy investment.Questions 3 and 4 are based on the news report you have just heard.3. What is the Competition Commission going to investigate?4. What is the route cause of the poor service at British airports according to the British Airports Authority?试题解析【话题分类】 时事新闻【新闻大意】 人们日益抱怨英国机场排队、飞机延误、拥挤、差劲的服务等问题，并将矛头指向英国机场管理局。竞争委员会介入并调查是否需要出售其资产，而刚被西班牙公司收购的英国机场管理局称，根本原因不在于所有制结构，而是跑道和航站楼的承载能力不足。3. 【考核技能】事件背景C) 【答案解析】根据录音原文 the Competi
共用题干
第三篇
Judging from recent surveys,most experts in sleep behavior agree that it is virtually an epidemic of sleepiness in the nation."I can't think of a single study that hasn't found Americans getting less sleep than they ought to,"says Dr. David.Even people who think they are sleeping enough would probably be better off with more rest.
The beginning of our sleep-deficit crisis can be traced to the invention of the light bulb a century ago.From diary entries and other personal accounts from the 18th and 19th centuries,sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night. "The best sleep habits once were forced on us,when we had nothing to do in the evening down on the farm,and it was dark." By the 1950s and 1960s,that sleep schedule had been reduced dramatically,to between 7.5 and 8 hours,and most people had to wake to an alarm clock."People cheat on their sleep,and they don't even realize they're doing it,"says Dr. David."They think they're okay because they can get by on 6.5 hours,when they really need 7.5,8 or even more to feel ideally vigorous."
"Perhaps the most merciless robber of sleep,"researchers say,"is the complexity of the day." Whenever pressures from work,family,friends and community mount,many people consider sleep the least expensive item on his program."In our society,you're considered dynamic if you say you only need 5.5 hours' sleep.If you've got to get 8.5 hours,people think you lack drive and ambition."
To determine the consequences of sleep deficit,researchers have put subjects through a set of psychological and performance tests requiring them,for instance,to add columns of numbers or recall a page read to them only minutes earlier."We've found that if you're in sleep deficit,performance suffers,"says Dr. David."Short-term memory is weakened,as are abilities to make decision and to concentrate."
According to Dr. David,Americans___________.
A: are ideally vigorous even under the pressure of life
B:often neglect the consequences of sleep deficit
C:do not know how to relax themselves properly
D:can get by on 6.5 hours of sleep
答案：B
解析：
细节题。答案相关句在第二段第三句："The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark.”由此可知，以前夜晚一片漆黑，人们没有事做，因而那时的人们养成了最佳睡眠的习惯。本段首句提到了睡眠不足是因为电灯泡的发明，可推知十八九世纪的人因为没有照明，导致没有事情可做，因而养成了早睡觉的习惯。因此，选项B符合文意。选项A“没有精力和野心”和选项C “有最好的睡眠习惯”使用文中的只言片语进行干扰，不正确；选项D“第二天有很多事情要做”文中没有提及。
推断题。在第二段后半部分中，大卫博士提到其实在睡眠上人们在自欺欺人，只是他们没有意识到而已，并且人们认为睡6.5个小时他们完全可以应付。事实上，要确保精力充沛，他们需要7.5个小时、8个小时或更长时间的睡眠。在第三段中，大卫博士指出，每当面对工作、家人、朋友和社会的巨大压力时，很多人认为睡眠是最不重要的，是最可以有弹性的。由此不难得出结论，美国人不在乎睡眠不足的后果或对此视而不见，因此选项B 符合文意。
推断题。根据第三段内容可知，美国人往往通过减少睡眠时间的方式来处理生活中的事情，因为他们认为睡眠是最不重要的（the least expensive item)。因此，选项A 符合文意。选项B“需要更多的睡眠去应对生活压力”与文意正好相反；选项C“一天任何时候都可以用来睡觉”和选项D“充足的睡眠可以激发人的动力和野心”文中没有提及。
语义题。由最后一段第一句的put subjects through...tests可知，这些subjects要经过一些测试，由此推知，subjects即 “测试对象”。因此，选项C为正确答案。
推断题。由最后一段最后两句“We've found that if you're in sleep deficit, performance suffers…Short-term memory is weakened,as are abilities to make decision and to concentrate.”可知，睡眠关系到人的精力和表现，因此，选项D符合文意。虽然文章在最后一段提到了睡眠不足时，瞬时记忆力会下降，但并没有说睡多了可以提高记忆力，因此选项A“大幅度提高记忆力”不正确；选项B“被其他人认为精力充沛”是对原文的曲解；选项C“维持某人的日程安排”文中并未提及。
共用题干
第三篇
Judging from recent surveys,most experts in sleep behavior agree that it is virtually an epidemic of sleepiness in the nation."I can't think of a single study that hasn't found Americans getting less sleep than they ought to,"says Dr. David.Even people who think they are sleeping enough would probably be better off with more rest.
The beginning of our sleep-deficit crisis can be traced to the invention of the light bulb a century ago.From diary entries and other personal accounts from the 18th and 19th centuries,sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night. "The best sleep habits once were forced on us,when we had nothing to do in the evening down on the farm,and it was dark." By the 1950s and 1960s,that sleep schedule had been reduced dramatically,to between 7.5 and 8 hours,and most people had to wake to an alarm clock."People cheat on their sleep,and they don't even realize they're doing it,"says Dr. David."They think they're okay because they can get by on 6.5 hours,when they really need 7.5,8 or even more to feel ideally vigorous."
"Perhaps the most merciless robber of sleep,"researchers say,"is the complexity of the day." Whenever pressures from work,family,friends and community mount,many people consider sleep the least expensive item on his program."In our society,you're considered dynamic if you say you only need 5.5 hours' sleep.If you've got to get 8.5 hours,people think you lack drive and ambition."
To determine the consequences of sleep deficit,researchers have put subjects through a set of psychological and performance tests requiring them,for instance,to add columns of numbers or recall a page read to them only minutes earlier."We've found that if you're in sleep deficit,performance suffers,"says Dr. David."Short-term memory is weakened,as are abilities to make decision and to concentrate."
The word"subjects"(line 1,Para.4)refers to__________.
A:the performance tests used in the study of sleep deficit
B:special branches of knowledge that are being studied
C:people whose behaviors or reactions are being studied
D:the psychological consequences of sleep deficit
答案：C
解析：
细节题。答案相关句在第二段第三句："The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark.”由此可知，以前夜晚一片漆黑，人们没有事做，因而那时的人们养成了最佳睡眠的习惯。本段首句提到了睡眠不足是因为电灯泡的发明，可推知十八九世纪的人因为没有照明，导致没有事情可做，因而养成了早睡觉的习惯。因此，选项B符合文意。选项A“没有精力和野心”和选项C “有最好的睡眠习惯”使用文中的只言片语进行干扰，不正确；选项D“第二天有很多事情要做”文中没有提及。
推断题。在第二段后半部分中，大卫博士提到其实在睡眠上人们在自欺欺人，只是他们没有意识到而已，并且人们认为睡6.5个小时他们完全可以应付。事实上，要确保精力充沛，他们需要7.5个小时、8个小时或更长时间的睡眠。在第三段中，大卫博士指出，每当面对工作、家人、朋友和社会的巨大压力时，很多人认为睡眠是最不重要的，是最可以有弹性的。由此不难得出结论，美国人不在乎睡眠不足的后果或对此视而不见，因此选项B 符合文意。
推断题。根据第三段内容可知，美国人往往通过减少睡眠时间的方式来处理生活中的事情，因为他们认为睡眠是最不重要的（the least expensive item)。因此，选项A 符合文意。选项B“需要更多的睡眠去应对生活压力”与文意正好相反；选项C“一天任何时候都可以用来睡觉”和选项D“充足的睡眠可以激发人的动力和野心”文中没有提及。
语义题。由最后一段第一句的put subjects through...tests可知，这些subjects要经过一些测试，由此推知，subjects即 “测试对象”。因此，选项C为正确答案。
推断题。由最后一段最后两句“We've found that if you're in sleep deficit, performance suffers…Short-term memory is weakened,as are abilities to make decision and to concentrate.”可知，睡眠关系到人的精力和表现，因此，选项D符合文意。虽然文章在最后一段提到了睡眠不足时，瞬时记忆力会下降，但并没有说睡多了可以提高记忆力，因此选项A“大幅度提高记忆力”不正确；选项B“被其他人认为精力充沛”是对原文的曲解；选项C“维持某人的日程安排”文中并未提及。
共用题干
第三篇
Judging from recent surveys,most experts in sleep behavior agree that it is virtually an epidemic of sleepiness in the nation."I can't think of a single study that hasn't found Americans getting less sleep than they ought to,"says Dr. David.Even people who think they are sleeping enough would probably be better off with more rest.
The beginning of our sleep-deficit crisis can be traced to the invention of the light bulb a century ago.From diary entries and other personal accounts from the 18th and 19th centuries,sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night. "The best sleep habits once were forced on us,when we had nothing to do in the evening down on the farm,and it was dark." By the 1950s and 1960s,that sleep schedule had been reduced dramatically,to between 7.5 and 8 hours,and most people had to wake to an alarm clock."People cheat on their sleep,and they don't even realize they're doing it,"says Dr. David."They think they're okay because they can get by on 6.5 hours,when they really need 7.5,8 or even more to feel ideally vigorous."
"Perhaps the most merciless robber of sleep,"researchers say,"is the complexity of the day." Whenever pressures from work,family,friends and community mount,many people consider sleep the least expensive item on his program."In our society,you're considered dynamic if you say you only need 5.5 hours' sleep.If you've got to get 8.5 hours,people think you lack drive and ambition."
To determine the consequences of sleep deficit,researchers have put subjects through a set of psychological and performance tests requiring them,for instance,to add columns of numbers or recall a page read to them only minutes earlier."We've found that if you're in sleep deficit,performance suffers,"says Dr. David."Short-term memory is weakened,as are abilities to make decision and to concentrate."
Many Americans believe that__________.
A:sleep is the first thing that can be sacrificed when one is busy
B:they need more sleep to cope with the complexities of everyday life
C:to sleep is something one can do at any time of the day
D:enough sleep promotes people's drive and ambition
答案：A
解析：
细节题。答案相关句在第二段第三句："The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark.”由此可知，以前夜晚一片漆黑，人们没有事做，因而那时的人们养成了最佳睡眠的习惯。本段首句提到了睡眠不足是因为电灯泡的发明，可推知十八九世纪的人因为没有照明，导致没有事情可做，因而养成了早睡觉的习惯。因此，选项B符合文意。选项A“没有精力和野心”和选项C “有最好的睡眠习惯”使用文中的只言片语进行干扰，不正确；选项D“第二天有很多事情要做”文中没有提及。
推断题。在第二段后半部分中，大卫博士提到其实在睡眠上人们在自欺欺人，只是他们没有意识到而已，并且人们认为睡6.5个小时他们完全可以应付。事实上，要确保精力充沛，他们需要7.5个小时、8个小时或更长时间的睡眠。在第三段中，大卫博士指出，每当面对工作、家人、朋友和社会的巨大压力时，很多人认为睡眠是最不重要的，是最可以有弹性的。由此不难得出结论，美国人不在乎睡眠不足的后果或对此视而不见，因此选项B 符合文意。
推断题。根据第三段内容可知，美国人往往通过减少睡眠时间的方式来处理生活中的事情，因为他们认为睡眠是最不重要的（the least expensive item)。因此，选项A 符合文意。选项B“需要更多的睡眠去应对生活压力”与文意正好相反；选项C“一天任何时候都可以用来睡觉”和选项D“充足的睡眠可以激发人的动力和野心”文中没有提及。
语义题。由最后一段第一句的put subjects through...tests可知，这些subjects要经过一些测试，由此推知，subjects即 “测试对象”。因此，选项C为正确答案。
推断题。由最后一段最后两句“We've found that if you're in sleep deficit, performance suffers…Short-term memory is weakened,as are abilities to make decision and to concentrate.”可知，睡眠关系到人的精力和表现，因此，选项D符合文意。虽然文章在最后一段提到了睡眠不足时，瞬时记忆力会下降，但并没有说睡多了可以提高记忆力，因此选项A“大幅度提高记忆力”不正确；选项B“被其他人认为精力充沛”是对原文的曲解；选项C“维持某人的日程安排”文中并未提及。
根据下面资料，回答题
I′ve often wondered how exactly sleep, or lack of it, can have such an awful effect on our bodies and, guess what, how much we sleep switches good genes on and bad genes off.
In the first half of 2013, the Sleep Research Centre at the University of Surrey found a direct link between hours spent sleeping and genes. Every cell in our bodies carries genetic instructions in our DNA that act as a kind of operating handbook. However, each cell only "reads" the part of this handbook it needs at any given moment.
Can sleep affect how a gene reads instructions It′s a question asked by Professor Derk-Jan Dijk at the University of Surrey. He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.
Blood samples were taken each week to compare which genes in blood cells were being used during the long and short nights. The results were rather surprising. Several hundred genes changed in the amount they were being used, including some that are linked to heart disease, cancer, and Type 2 diabetes. Genes to do with cell repair and replacement were used much less.
Sleep restriction (six and a half to seven hours a night) changed 380 genes. Of these,220 genes were down regulated (their power was reduced), while 160 were up regulated (their power was increased). Those affected included body-clock genes which are linked to diabetes. One of the most downgraded genes is that which has a role in controlling insulin and is linked to diabetes and insomnia. The most upgraded gene is linked to heart disease.
So changing sleep by tiny amounts can upgrade or downgrade genes that can influence our health and the diseases we suffer from when we sleep too little.
The important message is that getting close to eight hours of sleep a night can make a dramatic difference to our health in just a few days through the way it looks after our genes.
Which of the following may be concluded from the passage 查看材料
A.The experiment was performed at the University of Surrey in early 2013.
B.Body-clock genes are associated with heart disease, cancer and Type 2 diabetes.
C.Sleep restrictions may contribute to disease like diabetes, insomnia, and heart disease.
D.7.5-8 hours' sleep pattern makes little difference compared with 6.5-7 hours' sleep pattern.
答案：C
解析：
推断题。根据第五段内容可知，睡眠时间不足可能引起人体基因的变化，而这些基因变化可以导致人体某些病症的产生，如糖尿病、失眠症、心脏病等，故C项正确。文章第二段的第一句话中虽然提到了“In the first half of 2013”和“at the University of Surrey”．但这里指的是英国萨里大学睡眠研究中心的一项发现，而不是指后来Derk-Jan Dijk教授所进行的实验，故A项不正确。文中提到了body-clock genes(控制生物钟的基因)与糖尿病有关，并没有提到它们和其他疾病的关系，故B项不正确。根据倒数第二段“So changing sleep by tiny amounts Can upgrade or downgrade genes that Can influence our health…”及最后一段“The important message is that getting close to eight hours of sleep a night Can make a dramatic difference to our health…”可知D项不正确。故本题选C。
根据下面资料，回答题
I′ve often wondered how exactly sleep, or lack of it, can have such an awful effect on our bodies and, guess what, how much we sleep switches good genes on and bad genes off.
In the first half of 2013, the Sleep Research Centre at the University of Surrey found a direct link between hours spent sleeping and genes. Every cell in our bodies carries genetic instructions in our DNA that act as a kind of operating handbook. However, each cell only "reads" the part of this handbook it needs at any given moment.
Can sleep affect how a gene reads instructions It′s a question asked by Professor Derk-Jan Dijk at the University of Surrey. He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.
Blood samples were taken each week to compare which genes in blood cells were being used during the long and short nights. The results were rather surprising. Several hundred genes changed in the amount they were being used, including some that are linked to heart disease, cancer, and Type 2 diabetes. Genes to do with cell repair and replacement were used much less.
Sleep restriction (six and a half to seven hours a night) changed 380 genes. Of these,220 genes were down regulated (their power was reduced), while 160 were up regulated (their power was increased). Those affected included body-clock genes which are linked to diabetes. One of the most downgraded genes is that which has a role in controlling insulin and is linked to diabetes and insomnia. The most upgraded gene is linked to heart disease.
So changing sleep by tiny amounts can upgrade or downgrade genes that can influence our health and the diseases we suffer from when we sleep too little.
The important message is that getting close to eight hours of sleep a night can make a dramatic difference to our health in just a few days through the way it looks after our genes.
Which of the following can be inferred from the findings of the sleep research 查看材料
A.When there is a sleep restriction, genes to do with cell repair and replacement function less.
B.In a sleep, several hundred genes change in the amount. The more changes, the worse results.
C.When genes are up regulated, they do good to health; when genes arc down regulated, they do harm to health.
D.Eight hours of sleep a day can be beneficial to our health in that it looks after our genes.
答案：D
解析：
推断题。根据文章最后一段“The important message is that getting close to eight hours of sleep a night Can make a dramatic difference to our health in just a few days through the way it looks after our genes．”可知，8个小时的睡眠模式对人体是非常有益的，因为这样的睡眠时间能很好地照料我们的基因，D项是此段话的同义表达，故选D。A项属于原文的直接信息，不用推断。B项说法错误，改变越多，并不一定意味着结果越差，要看这种改变是导致基因活性降低还是上升。文章第五段中提到，在下调程度最高的基因中，有一种负责控制胰岛素合成的基因与糖尿病和失眠密切相关，而上调程度最高的基因则与心脏病有关联，可见基因下调和上调均可能对健康有害，故C项说法错误。
