C
Sometimes we cry because we are sad and sometimes because we are extremely happy．An irritant(刺激物)，such as onion(洋蔥) smell or grains of sand in the eye，can also make cry．In this case tears perform an obvious role in getting rid of substances that might harm the surface of the eye．
Dr．William Frey of the Dry Eye and Tear Research Center at St．Paul in Minnesota，USA，believes that tears from emotional causes may perform a similar role．He thinks that crying could get rid of emotional stress by washing away a chemical in the blood caused by strong emotions. To prove his theory, he hopes first to identify this chemical and then see if it is found in tears of sadness or happiness．  
So far, Dr．Frey has failed to find out the difference between emotional tears and tears caused by an irritant in the eye．This may be because these substances themselves cause a degree of stress and emotion．What he has identified in all tears is a variety of biochemicals(生化物)which are one of the causes of stress．A more detailed study may help us understand why sufferers from stress-related disorders cry less often than healthy people．Dr．Frey is also very interested to see if there are any physiological(生理學(xué)的)explanations for why women，in general，cry five times more often than men，on average．
64. The main purpose of Dr．Frey’s study of tears is to           
A. show that there are two types of tears，caused by irritants and by emotions
B. find out the cause of stress-related problems and emotional disorders
C. explain why women cry more often than men
D. prove that tears can remove a chemical in the blood caused by strong emotions
65. Which of the following is true according to the passage?
A. Tears fail to help get rid of emotional stress．
B. Irritants in the eye result in tears without causing stress and emotion．   
C. Healthy people cry more often than those with stress-related problems．
D. The biochemical identified by Dr．Frey has nothing to do with stress．
66. We can learn from the passage that __________．
A. crying does us more harm than good
B. inner feelings don’t affect our bodies
C. sorrow may cause some chemicals in our blood
D. emotional tears are different from tears caused by irritants in the eye
67. Dr．Frey believes that tears from emotional causes may play a role in getting rid of ______．
A. emotional stress by washing away a chemical in the blood
B. onion smell or grains of sand
C. sufferings from irritants
D. substances that might not harm the surface of the eye
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：完形填空


第二部分：語(yǔ)言知識(shí)及運(yùn)用（滿(mǎn)分25分）
第一節(jié)完形填空(共10小題；每小題1.5分，滿(mǎn)分15分)
Trees are useful to man in three very important ways. They provide him with wood and other   __21__ ; they give him shade; they help to prevent drought(干旱)and  __22__.
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important.
Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire, but,__23__its trees, its soil became hard and poor. When the empire fell to__24__,the home country found itself faced by floods and starvation.
Even where a government realizes the importance of a plentiful supply of trees, it is difficult for__25__to persuade the villager to see this. The villager wants wood to cook his food with ; and he can earn money by making charcoal or selling wood to the townsman. He is usually too lazy or too careless to plant and look after new trees. So, unless the government has a good system of control, or can__26__the people, the forests will slowly disappear.
This does not only mean that the villagers’ sons and grandsons have__27__trees. The results are even more serious; for where there are trees, their roots break the soil up—allowing the rain to sink in—and also bind(結(jié)合)the soil, thus preventing its__28__washed away easily, but where there are no trees ,the rain falls on hard ground and carrying__29__with it the rich top soil, in which crops__30__so well. With all the topsoil gone, nothing remains but worthless desert.
21．A. uses                  B. products                   C. production                D. result
22．A. floods           B. soil                         C. air                           D .sunlight
23．A. with                 B. by                           C. on                           D. without
24．A. break        B. unite                        C. bits                          D. pieces
25．A. it                  B. them                        C. he                            D. they
26．A. ask                   B. educate                    C. want                        D. remove
27．A. a few            B. fewer                       C. a little                      D. little
28．A. been             B. being                       C. is                             D. was
29．A. away            B. off                           C. with                         D. by
30．A. come            B. grow                        C. get                           D. Turn

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


B
Advice to “sleep on it” could be well founded, scientists say. After a good night’s sleep a problem that couldn’t be solved the night before can often appear more manageable, although the evidence（證據(jù)）until now has been personal experience. But researchers at the University of Luebek in Germany have designed an experiment that shows a good night’s sleep can improve insight（洞察力）and problem-solving.
“If you have some newly-got memories in your brain, sleep acts on these memories and rebuild them, so that after sleep the insight into problem which you could not solve before increases,” said Dr Jan Born, a neuroscientist（神經(jīng)病學(xué)專(zhuān)家）at the university. To test the theory, they taught volunteers two simple rules to help them turn some numbers into a new order．There was also a third，hidden rule，which could help them increase their speed in solving the problem．The researchers divided the volunteers into two groups：half were allowed to sleep after the training while the rest were forced to stay awake．Dr Jan Born and his team noticed that the group that had slept after the training were twice as likely to figure out the third rule as the other group．“Sleep helped，”Born said in a telephone interview．“The important thing is that you have to have a memory representation in your brain of the problem you want to solve and then you sleep，so it can act on the problem．”But Born admitted that he and his team don’t know how rebuilding of memories occurs or what governs it．Pierre Maquet and Perrine Ruby of the University of Liege in Belgium said the experimental evidence supports the suggestions that sleep can help develop creative thinking．Although the role of sleep in human creativity will still be a mystery，the research gives people good reason to fully respect their periods of sleep，they added．
60．The underlined phrase“sleep on it”in Paragraph 1 probably means_________．
A．to delay deciding something until the next day
B．to get as much sleep as possible
C．to go on sleeping without being disturbed
D．to sleep till after the time you usually get up in the morning
61．Jan Born and his team carried out the experiment through________．
A．comparison    B．interview        C．survey          D．imagination
62．It can be inferred from the passage that___________．
A．people should sleep so long as they have time
B．sleep is the only way to solve hard problems
C．people have various periods of sleep   D．people know how sleep rebuilds memories
63．What would be the best title for the passage?
A．How Sleep Works．               B．Sleep Helps Solve Problems．
C．No Evidence，But Well Founded．   D．Born’s Discovery on Sleep．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


B
Two new studies suggest that modern running shoes could increase the risk of injuries to runners.
One study involved sixty-eight healthy young women and men who ran at least twenty-four kilometers a week. The runners were observed on a treadmill machine. Sometimes they wore running shoes. Other times they ran barefoot.
Researchers from the JKM Technologies Company in Virginia, the University of Virginia and the University of Colorado did the study.
They found that running shoes create more stress that could damage knees, hips and ankle joints than running barefoot. They observed that the effect was even greater than the effect reported earlier for walking in high heels.
The study appeared in the official scientific journal of the American Academy of Physical Medicine.
The other study appeared in the journal Nature. It compared runners in the United States and Kenya. The researchers were from Harvard University in Massachusetts, Moi University in Kenya and the University of Glasgow in Scotland.
They divided the runners into three groups. One group had always run shoeless. Another group had always run with shoes. And the third group had changed to shoeless running.
Runners who wear shoes usually come down heel first. That puts great force on the back of the foot. But the study found that barefoot runners generally land on the front or middle of their foot. That way they ease into their landing and avoid striking their heel.
Harvard’s Daniel Lieberman led the study. He says the way most running shoes are designed may explain why those who wear them land on their heels. The heel of the shoe is bigger and heavier than other parts of the shoe, so it would seem more likely to come
down first. Also, the heel generally has thick material under it to soften landings.
60. How many organizations are involved in the two studies?
A. Three.                          B. Four.                      C. Five.                      D. Six.
61. What can we learn from the text?
A. Most running shoes are designed improperly.
B. The design of high heels is better than that of running shoes.
C. No one will run with running shoes in the future.
D. Both of the studies are done in America.
62. Why do running shoes increase the risk of injuries to runners?
A. They could create stress. 
B. They’re too big and heavy.
C. They can affect the way the runners land.   
D. Their heels can soften landings.
63. How did the researchers do the two studies?
A. By practising.         B. By comparing.      C. By questioning.     D. By reasoning.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Poorer children would be offered the chance to attend lessons on Saturday to help catch up with their middle?class peers (同齡人), the shadow schools secretary, Michael Gove, said today.?The Conservatives would give English state schools the freedom to choose to have longer teaching hours and extra classes at the weekend, he told the Association of Teachers and Lecturers’annual conference.?
Gove said the move would help to close the achievement gap with richer children whose parents could afford extras such as tutoring and music lessons.?
He told delegates (代表) in Manchester: “For children who come from homes where parents don’t have the resources to provide additional stretch and cultural experiences, there are benefits in having those children in the learning environment, in school, for longer.”?
“Parents would love to have schools starting earlier in some circumstances, and certainly going on later in the afternoon, given the reality of their working lives,” he said. He held up the example of Kipp (Knowledge is Power Program) schools in the US, which are often based in the poorest communities and open from 7:30 am to 5pm on weekdays, plus Saturdays.?
But it would be up to schools to decide to offer longer hours, Gove added. ?
Parents said Saturday classes could become a “badge of dishonor”if pupils were forced to go, while teachers raised concerns about their workload.?
Margaret Morrissey, of Parents Outloud, said: “I think the suggestion the government made about one-to-one teaching for these kids would be a more preferable way of improving these children’s performance. I’m just not sure whether taking away a child at weekends is actually going to make them cleverer in the week.”?
The ATL’s general secretary, Mary Bousted, said: “If we want Saturday schools, then we need more teachers doing the extra hours, not the same teachers working longer.”?
66. The program is intended for children____________. ?
A. who are from middle-class families?
B. whose parents can’t afford extra help ?
C. who perform poorly academically ?
D. whose weekends are mostly unoccupied
67. “Additional stretch” in Paragraph 4 probably refers to_________.?
A. music lessons
B. physical relaxation ?
C. entertainment activities?
D. out-of-school improvement
68. Why did Gove mention Kipp schools in the US? ?
A. To make a comparison.?
B. To introduce a new program.?
C. To seek supportive evidence.?
D. To prove his program is better.
69. What is Margaret Morrissey’s opinion about the new program? ?
A. Favourable.          B. Doubtful.           C. Optimistic.         D. Acceptable.
70. Which of the following is true??
A. Teachers may not like the program. ?
B. Schools are trying to make profits.?
C. The program is already under way. ?
D. The program is popular with children. ?

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


C
Scientists used to explore on the surface of the ocean. Now they are exploring below the surface, too. They want to know about ocean water and the plant and animal life deep in the ocean.
In 1934 the scientist William Beebe dived 3,000 feet below the surface in a hollow steel ball. In 1935 August Piccard dived 10, 330 feet. In 1960 his son Jean dived to a depth of 35,800 feet.
All these early dives were deep. But the divers could not stay down for very long. They had to come back up to the surface after a few seconds. Scientists needed to stay down longer to study life below the surface. Gradually they succeeded. Cousteau, a Frenchman, was able to keep men down to a depth of 36 feet for one month and to a depth of 90 feet for a week.
Now scientists are developing even better equipment. With this new equipment, men can stay below the surface for days or even weeks. In 1962 Cousteau set up a research station 35 feet below the surface. Then in 1964 he set up another station on the ocean floor of the Red Sea. This was the first undersea station to operate without help from the surface.
Many countries are now studying undersea living things. The former Soviet Union had an undersea laboratory in the Crimean Sea. The United States has a laboratory 50 feet down on the ocean floor off the Virgin Islands. In 1970 five men lived there for two weeks. Then a team of five women scientists stayed in the laboratory. Next came other teams of men. All were there to explore the ocean depths and to make plans for the use of its resources. Scientists hope to find enough mineral, vegetable, and animal wealth there to provide food for the entire world.
64. In order to _____, scientists are exploring below the surface of the ocean.
A. know about the ocean water deep in the ocean
B. know about the plant and animal life deep in the ocean
C. stay down longer to study life of the plant and animal below the surface
D. both A and B
65. Who set up the first undersea station?
A. A Frenchman                         B. An American
C. A Russian                              D. The passage made no mention
66. Which of the following is true according to the passage?
A. Nobody can stay below the surface of the ocean.
B. The early divers could not stay below the surface of the ocean for very long.
C. The purpose of setting up the undersea laboratories is to make plans for the use of the resources in the ocean.
D. Up to now only five women scientists have stayed in the undersea laboratory.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

An important scientific report announced “irrefutable（不能反駁的） proof” that climate change is happening and it’s all our fault. How long has it been before people are against the global warming idea? But here’s a funny thing. Last year there was a very bad hurricane season in the Caribbean when, among other disasters, New Orleans was all but wiped off the map. We were wisely informed by the experts at the time that this was owing to global warming.
I remember watching a BBC science programme and hearing a learned professor with a beard tell us, “The increased frequency and strength of hurricanes is what we shall have to learn to expect given global warming.”
This year there have been far fewer hurricanes and those there have been were relatively mild. Why？Global warming again of course. Professor Bjorn Lomborg, author of The Skeptical Environmentalist, writes, “In the constant media reports of possible greenhouse related disasters, almost any event is now linked to climate change.” He adds, “We should not spend vast amounts of money to cut a tiny slice of the global temperature increase when this leads to a poor use of resources and when we could probably use these funds far more effectively in the developing world.” For saying this, Lomborg has had death threats.
Other scientists who do not toe the global warming-is-happening-and-it’s-all-our-fault line have received the same. There are plenty of people who count against global warming. A world of senior climatologists and meteorologists wrote to the Times last year to complain that they couldn’t get their research findings published — because they disagreed to it. We have had a warm autumn. The experts,  fanatics（狂熱者） all of them, put it down to global warming. If we have an extra cold winter, they will tell us it’s a result of global warming. If my big toe feels cold or hurts badly, it will be owing to global warming.
52. The purpose of this passage may be to ____.
A. support the idea of global warming  
B. organize a debate about global warming
C. speak out against the global warming idea
D. encourage people to use money effectively
53. What happened to New Orleans last year?
A. It was badly destroyed.                          B. It disappeared in the world.
C. It witnessed global warming.               D. It experienced several disasters.
54. From the passage, we can infer that ____.
A. people are taking too many efforts to stop global warming
B. people have realized the side effect of development
C. a different idea sometimes may cost one his life
D. the majority usually stand for the correct opinion
55. The main idea of the last paragraph may be ____.
A. global warming may lead to toe’s catching cold in a sense
B. the Times refuses to publish articles on global warming
C. a warming autumn is not related to global warming at all
D. it is certainly incorrect to owe everything to global warming

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

The other day in school, we were discussing jobs. Our teacher, Mrs. Bolt said that career was very important and that it was never too early to think about your life’s work. Most of the young boys really were not too sure about what they wanted to be. But I knew exactly what I wanted to be, and when Mrs. Bolt asked me, I replied “A truck driver.”
“A truck driver?” repeated Mrs. Blot. “Why do you want to be one, Tom?”
“Because truck drivers are always on the move. They do not have to sit at desks all day. They are out on the road and they see a lot of the country. The pay is good, too. And you never have any homework.”
The class laughed.
“Well, Tom.” answered Mrs. Bolt. “You certainly sound quite enthusiastic (熱情的). I guess that you don’t like sitting at a desk or doing homework. Is that correct, Tom?”
“Yes, I guess so, ” I said.
“Well, since you are so interested in becoming a truck driver, I think you should look into the field a little further. I want you to go to the library and take out a book on truck driving. And I want you to write a paper on it and hand it in at the end of the month.”
That’s the last time I’ll never tell anybody my secret ambition (雄心).
46．Mrs. Bolt suggested Tom write a book report because         .
A．she was angry with him.
B．she wanted him to learn about the other side of truck driving.
C．she was making fun of him.
D．she wanted the whole class to follow him
47．Which of the following is NOT true?
A．The writer thinks that truck drivers are well paid.
B．What Tom said made his classmates laugh.
C．It seemed as if Tom did not enjoy doing his homework.
D．Mrs. Bolt didn’t want Tom to become a truck driver.
48．Tom wouldn’t tell about his ambition any more because          .
A．he didn’t think his ambition could come true.
B．he just got more homework to do.
C．he was laughed at by the whole class.
D．he would not be able to become a truck driver.
49．What can we infer about Mrs. Bolt?
A．She was unkind to her students.            B．She was unfit for her position.
C．She was a teacher with ripe experience.  D．She always did something strange. 

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


(D)
Malaria, the world's most widespread parasitic（寄生蟲(chóng)引起的）disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't （or can't） seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect （感染）. They can also attach themselves to blood vessels in the brain. If it doesn't kill you, malaria can happen again and again for years. The disease passed on to humans by female mosquitoes infected with one of four species of parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth—and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.
76. According to paragraph 1, many people don't seek care because _______.
A. they are too poor
B. it is unusual to seek care
C. they can remain unaffected for long
D. there are too many people suffering from the disease
77. People suffering from malaria _______.
A. have to kill female mosquitoes      B. have ability to defend parasites
C. have their red blood cells infected    D. have sudden fever, followed by chills
78. Which of the following may be the reason for the wide spread of the disease?
A. Its resistance to global warming.
B. Its ability to pass on the virus frequently.
C. Its outbreaks in cities with large populations.
D. Its ability to defend itself and resist new drugs.
79. It can be inferred from the passage that _______.            .
A. no drugs have been found to treat the disease
B. the alternative treatment is not easily available to most people
C. malaria has developed its ability to resist parasites
D. nobody knows what will be the drug to treat the disease
80. Which of the following questions has NOT been discussed in the passage?
A. How can we know one is suffering from malaria?
B. How many people are killed by malaria each year?
C. Why are there so many people suffering from malaria?
D. What has been done to keep people unaffected for long?

查看答案和解析>>

同步練習(xí)冊(cè)答案