The effects of rapid travel on the body are actually far more disturbing than we

The effects of rapid travel on the body are actually far more disturbing than we

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The effects of rapid travel on the body are actually far more disturbing than we realize. Jet Lag is not a psychological consequence of having to readjust to a different time zone. It is due to changes in the body’s physiological regulatory mechanisms, specifically the hormonal systems, in a different environment.
Now that we understand what Jet Lag is, we can go some way to overcome it. A great number of the body’s events are scheduled to occur at a certain time of day. Naturally these have to be regulated, and there are two regulatory systems which interact.
One timing system comes from the evidence of our senses and stomachs, and the periodicity we experience when living in a particular time zone. The other belongs in our internal clocks (the major one of which may be physically located in a part of the brain called the suprachiasmatic nucleus) which, left alone, would tie the body to a 25-hour rhythm. Normally the two timers are in step, and the surroundings tend to regularize the internal clocks to the more convenient 24-hour period.
  If, however, you move the whole body to a time zone which is four hours different, the two clocks will be out of step, like two alarm clocks which are normally set together, but which have been reset a few hours apart. Whereas the two clocks would normally sound their alarms together, now they ring at different times. Similarly, the body can be set for evening while the sun is rising.
In time the physiological system will reset itself, but it does take time. One easily monitored rhythm is palm sweating. A man flown to a time zone different by 10 hours will take eight days to readjust his palm sweat. Blood pressure, which is also rhythmical, takes four days to readjust.
What can we do about it? It is not feasible to wait four days until the body is used to the new time zone. Fortunately there is a short cut. It relies on two things-the power of the stomach to regulate the timing of other events, and the pharmacological actions of coffee. The basic assumptions are:
Coffee delays the body clock in the morning, and advances it at night. Coffee at mid-afternoon is neutral. Protein in meals stimulates wakefulness, while carbohydrates promote sleep. Putting food into an empty stomach helps synchronize the body clock.
46. What is jet lag associated with?
A. Psychological change.           B. Physiological change.
C. Inexperience of rapid travel.      D. Unfamiliar environment.
47. What helps us to adjust to a 24-hour rhythm?
A. Alarm clock.                  B. Suprachiasmatic nucleus in our brain.
C. Signals from outside of the body.   D. Our senses and stomachs.
48. What do we know from the fifth paragraph?
A. A person moving to a different time zone will suffer from high blood pressure.
B. A person moving to a different time zone will sweat a lot.
C. Moving to a different time zone will affect both palm sweat and blood pressure.
D. If the rhythm of blood pressure and palm sweat are not in step, there will be jet lag.
49. What should we do if we want to stay awake?
A. To take coffee at three o’clock in the afternoon.
B. To have meals that contain lots of protein.
C. To have some carbohydrate drinks.
D. To stop putting food into our stomach.
50. How can we cure jet lag?
A. To sleep for days.      B. To wait for self-recovery.
C. To drink tea.          D. To get something to eat.
答案

小题1:B
小题2:C
小题3:C
小题4:B
小题5:D
解析
         
举一反三
Bend over, take a deep breath and drink some water! This is just one of hundreds of tips you might get if you have the hiccups (打嗝).Hiccups are so mysterious.We really don"t know why they start and why they stop.
Everyone has a favorite cure for a case of the hiccups.Some people think that a good scare is necessary to get well.Others eat a teaspoon of sugar.Still others drink a glass of water with a knife in it.
An American man named Jack O"Leary said he had hiccupped 160 million times over a period of eight years.He tried 60,000 cures, but none of them worked.At last he prayed to Saint Jude, the saint of Hopeless cases, and his hiccupping stopped immediately.
It took a British plumber eight months to cure his hiccups.People from all over the world wrote him letters with suggestions for getting well.He tried them all, but the hiccups continued.Finally, he drank a "secret" mixture someone had sent him.By that evening his hiccups were gone.
Why did these cures work for these two men? No one really knows.But people who have studied many cases of hiccups have an idea—hiccups usually go away if you believe in the cure.
小题1:How did Jack O"Leary stop his hiccups?
A.He took a deep breath.B.He prayed to Saint Jude.
C.He ate a teaspoon of sugar.D.He drank a "secret" mixture.
小题2:The British plumber spent _ ___in stopping his hiccups.
A.4 hoursB.2 days C.8 months D.8 years
小题3:      might be the best cure for hiccups according to the passage.
A.Cold waterB.A spoonful of salt
C.Special pillsD.What you believe in
小题4:From this passage, we can learn ____.
A.Saint Jude is an expert in curing the hiccups
B.the reason why the hiccups start and why the hiccups stop
C.some people think that a good scare is a cure for a case of hiccups
D.the British plumber drank a "secret" mixture given by an experienced doctor and then became well
小题5:What is the main idea of this passage?
A.Different ways to stop hiccups.B.What makes hiccups happen.
C.How to get hiccups.D.Jack O"Leary"s hiccups.

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Uncertainty spreads through our lives so thoroughly that it dominates our language,Our everyday speech is made up in large part of words like probably, many, soon,great,little.What do these words mean? 
Such verbal imprecision is not necessarily to be criticized. Indeed, it has a value Just because it allows uw to express judgments when a precise quantitative statement is out of the question.
We have been trying to pin down by experiments what people meari by these expressions in specific contexts, and how the meanings change with age. For instance,a subject is told "There are many trees in the park" and is asked to say what number the word may mean to him. Or a child is invited to take "some" sweets from a bowl and we then count how many he has taken. We compare the number he takes when he is alone with the number when one or more other children are present and are to take some sweets after him, or with the number he takes when told to give
“some" sweets to another child.
First, we find that the number depends, of course, on the items involved. To most people some friends means about five, while some trees means about twenty. However, unrelated areas sometimes show parallel values. For instance, the language of probability seems to mean about the same thing in predictions about the weather and about politics: the expression is certain to( rain,or be elected)signifies to the average person about a 70 percent chance; is likely to, about a 60 percent chance; probably will, about 55 percent.
Secondly, the size of the population of items influences the value assigned to an expression.Thus, if we tell a subject to take "a few" or“a lot of" glass balls from a box, he will take me if the box contains a large number of glass balls than if it has a small number, But not proportionately more: if we increase the number of glass balls eight times, the subject takes only half as large a percentage of the total.
Thirdly, there is a marked change with age. Among children between six and fourteen years old, the older the child, the fewer glass balls, he will take. But the difference between a lot and a few widens with age. This age effect is so consistent that it might be used as a test of intelligence.
51. What"s the right attitude towards the words like probably, any and soon ?
A. They are inaccurate and we should avoid them.
B. They are necessary since we cannot be always precise.
C. They should be criticized because there are too many of them.
D. Their value is not yet clear since we don"t know their meaning.
52. Why do we do experiments with the words many and some?
A. To prove that people are insensitive to these words.
B. To prove that the words dominate our everyday speech.
C. To find out how the meanings vary with age and contexts.
D. To find out whether the words can mean a precise quantity.
53. Which of the following expressions means a larger chance in weather broadcast?
A. Possible.   B. Probable.   C. Be likely to.  D. Be certain to.
54. Which of the following is similar to the underlined word signifies in its meaning?
A. makes    B. means     C. predicts    D. indicates
55. Which of the following can be the best title for the passage?
A. Uncertainty in the Language Use.
B. How to Use Language in an Uncertain Way
C.Uncertain Words and their Use in Specific Contexts
D. Experiments on Relationship between Uncertainty and Language Use
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Ⅳ.阅读理解(共20小题;每小题2分,满分40分)
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
The holiday season can be a very stressful time for many people.Sometimes,we ale too busy to shop for the right gifts for our friends and family.
Besides that,you may hurry,not only to find the right present,but also a parking place for your car.
The people you give gifts to have different interests,and it is hard to go everywhere to fend suitable gifts.Some of the best gifts I have found have been online.This saves me a lot of trouble.I can find the best sports tickets and best event tickets all from my own chair.
There are different types of tickets for sale online.You can buy anything nowadays from concerts to the best sporting events available.You may even find tickets for nearly everyone.
The tickets are colorful,such as the circus,shows for children,or The Sound of Music.These events are fun for the whole family and interesting gifts.
Wherever you live, you can get tickets for just about any city in North America.You won’t have to pay an arm and a leg for the best sports tickets or for superior seats for shows.Sometimes,the tickets can turn out to be cheapen
Tickets make truly nice presents.First of all, you don’t have to walk up and down the store.Secondly, you can usually spend less money.Thirdly, you have a vast of selections when you look for tickets on the Internet.There is always a clever choice online for everyone on your gift list.Want to know more? Crick here!
56.The underlined part “to pay all arm and a leg”means      
A.to spend money in buying an arm and a leg
B.to spend time in getting an arm and a leg
C.to be busy driving up and down
D.to be busy watching sports meetings
57.The main purpose of writing the passage is       .
A.to sell the useful and colorful tickets
B.to tell you some kinds of tickets you may buy
C.to buy the tickets online or in shops
D.to introduce a new way to buy presents
58.Which one do you think is the best title of the passage?
A.Ticket—a Nice Present   
B.Do No Shopping on Holidays
C.Different Colorful and Useful Tickets
D.How to Buy Tickets in Holidays
59.According to the passage,we are sure that        
A.the article comes from a magazine
B.you can buy tickets for your friends in any city
C.we may buy some tickets at a low price sometimes
D.a friend in England may get your ticket-present
题型:不详难度:| 查看答案
Do you want to have a mobile phone? Have you had a mobile phone already? Nowadays more and more students have their own mobile phones, and mobile phone use has become a problem for middle schools. Some middle schools in China have banned students from carrying mobile phones during school hours.
Mobile phone use among children has become a big problem for the school this year. Some children have got mobile phones as birthday gifts, and more students want them.
Wang Pi, an official, said, “Mobile phone use is a distraction (分散注意力的东西) to students during school hours and it also gives teachers so much trouble in their classrooms.” Teachers were also saying that sometimes students might use phone messages to cheat during exams.
Wang Pialso said some schools had tried to ban mobile phones, but some parents felt unhappy because they couldn’t get in touch with their children.
Many teachers said students should not have mobile phones at school, but if their was a good reason, they could leave their phones at school offices. They also said there were many reasons why the students should not have mobile phones at school. They were easy to lose and were a distraction from studies.
Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones.
小题1:Some middle schools have banned students from carrying mobile phones         .
A.because they are studentsB.because they don’t earn money
C.when they are at schoolD.when they are free
小题2:Some parents felt unhappy because they couldn’t        during school hours.
A.help the teachers with their workB.leave their mobile phones at school offices
C.use their mobile phonesD.get in touch with their children
小题3:The three underlined words “they” in Para. 5 refer to       .
A.teachers; students; mobile phonesB.teachers; mobile phones; students
C.students; teachers; mobile phonesD.students; mobile phones; teachers
小题4:The passage tells us that         .
A.it is impossible to ban students from using mobile phones at school
B.some parents felt unhappy because they couldn’t use their phones at school
C.students shouldn’t have mobile phones at school except for some special reasons
D.parents should teach their children how to use mobile phones during school hours

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第二节:完形填空(共20小题;每小题1.5分,满分30分)
阅读下面短文,掌握其大意,然后从36—55各题所给的四个选项(A、B、C和D)中,选出最佳选项。
This is a true story. Rex White lived in a  36  some distance from the coast, so he   37   to drive to Lytham and leave his car in a car park beside the river. Then he  38  row out to the pilot boat, and wait for the  39   ship that it was his duty to guide.
Early one morning, Mr. White   40   to Lytham from a night on duty, only to   41 he couldn"t start his car. He had driven from his village the evening before and left his car in the car park   42  . Now with his work finished; how he   43   to drive home to enjoy a cup of hot chocolate and a warm bed!   44  , no matter what he did, he could not get the engine to start.
It was a cold and windy night; there was no garage   45   to which he could turn for help. He was just about to   46 , and spend the rest of the night in his car,  when a bright idea 47   him.  He pushed his car round so that it was facing in the   48   of the wind, opened ail four doors,   49   it along a short way, and then jumped in. The doors acted like 50, and in no time the wind had taken him  51   out of the car park and away down the beach road. When he   52  the starter-switch once more,  the engine roared to   53  immediately.  All he had to do then was to stop the car and shut the   54  .
He went to bed later than usual,   55   he did not go without his cup of hot chocolate. Mr. White was not a seaman for nothing.
36. A. city               B. town            C. village                  D. family
37. A. decided            B. had             C. managed                  D. asked
38. A. could              B. should           C. would                   D. might
39. A. old                B. foreign          C. big                     D. particular
40. A. returned             B. got              C. went                   D. walked
41. A. accept             B.  tell           C. find                    D. remember
42. A. once more      B. as usual         C. at last               D. as well
43. A. prepared             B. supposed          C. hurried             D. desired
44. A. Sadly            B. Surprisingly    C. Naturally           D. Finally
45. A. inside              B. around           C. away                    D. ahead
46. A. shout at             B. break down    C. give out            D. give up
47. A. knocked             B. beat          C. kicked                  D. struck
48. A. position             B. direction           C. speed                   D. strength
49. A. pulled             B. rode             C. pushed                  D. followed
50. A. brakes             B. engines          C. energies                 D. batteries
51. A. nearly             B. right             C. almost                  D. hardly
52. A. opened             B. checked          C. tried                    D. provided
53. A. effect              B. way             C. use                     D. life
54. A. windows            B. doors            C. lights                   D. systems
55. A. but                    B. or               C. and                    D. so
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