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The history of inventions leading up to the modern computer is a story of people trying hard to create machines that complete many tasks automatically, such as adding up large numbers, controlling airplanes in flight, etc. Many of the earliest methods of recording and counting data still remain mysteries (something that is not understood).
In England you can visit Stonehenge, where a mysterious collection of large stones has stood since 1,500 BC. Scientists have never discovered the stones’ purpose. However, by observing the way the sun shines between the stones, many people believe Stonehenge was used to predict the seasons and eclipses (蚀) of the sun and the moon.
Another early method of computing was a brass calculator, which existed in Spain nearly 1,000 years ago. The machine was shaped like a human head, with numbers instead of teeth. The shape became its undoing; some people were afraid the machine was supernatural, and destroyed it. In early recorded history, calculators that used the sun, or objects in the night sky, were developed to be used on ships to explore the world beyond the Tigris-Euphrates Valley of southwestern Asia. One such device, dating from the first century, worked with a system of gears designed to track the orbits of stars and planets. These orbits became the marked routes for ships.
In ancient Rome and Greece, one of the earliest machines ever used for processing numbers was the abacus. This simple collection of beads has been used for centuries in China and other Asian countries. The abacus is built with columns of beads attached to a rectangular wooden frame. Inside the wooden frame is a crossbar that separates each column of beads into two sections. In the Chinese version there are two beads above the bar and five below. Each column of beads means a different range of numbers. The first column from the right represents ones, the second tens, the third hundreds, etc. By moving beads, calculations are quickly completed. Because values are shown by positions, the abacus is very valuable in teaching arithmetic to blind students.
Experienced users operate the abacus very quickly. After World War II, a speed competition was arranged in Japan between the fastest calculator operator in the US Army and an employee of the Japanese Post Office using an abacus. The American was defeated easily by the moving beads of his opponent.
62. What does the author mainly talk about in this passage?
A. Old methods to manage data. B. The great inventions in science.
C. The mysterious historical events. D. Theory and practice in computing.
63. How does the author try to prove his point?
A. By making comparisons. B. By analyzing the cause.
C. By telling a true story. D. By giving examples.
64. The underlined word “undoing” in Paragraph 3 probably means ________.
A. cause of bad luck B. reason for change C. way to escape D. loss of power
65. What will the author most probably discuss in the paragraph that follows?
A. The fast development of computer science.
B. The use of abacus in Japanese Post Office.
C. The inventor of the first modern computer.
D. The invention of the first analytical engine.
查看习题详情和答案>>Interpersonal Distance
With the outbreak of SARS,everyone tried to avoid coming into close contact with each other.In those days,interpersonal distance increased,“close contact” almost became synonymous with “danger”,and even children couldn’t have close contact with their mothers.Now SARS has disappeared,and we return back to normal living again.Then,how can we do handle interpersonal distance in our everyday lives?
Studies show that interpersonal distance can be divided into 4 different types:intimate distance,personal distance,social distance,and public distance.
Intimate distance is the interpersonal distance of a person with the people closest to him or her.It ranges from 0 to 45 cm.When a stranger comes within this distance,a person will have strong negative reaction.In crowded buses,strangers usually maintain rigid poses and try to avoid body contact,but couples,lovers,children and their mothers usually lean close to each other.Intimates who aren’t able to live close together for a long time can become alienated.Also,touching is also very important.A contrast test shows that the nervous systems of babies who are often caressed by their mothers develop much faster and their weight increases faster,by 47%,than that of other babies.
Personal distance ranges from 45 cm to 1 m.People can converse genially at this distance without invading each other’s personal space.When friends and acquaintances meet on the street,they usually greet and converse at this distance.
Social distance generally ranges from 1 m to 3 m.Among this range,1-2 m is usually the distance in which people deal with private affairs in social activities.For example,when you get money from banks,in order to protect your privacy,other customers are required to stand at least 1 m away from you.2-3.5 m is a farther social distance.Business talks usually occur at this distance.Besides talking,proper eye contact is also indispensable.Otherwise,each side will feel disrespected.
Public distance is usually used in public gatherings.It generally ranges from 3.5 m to about 7 m.Beyond this range,people can’t communicate using a normal voice.In classrooms,experienced teachers usually leave their lecture platforms to enhance their teaching.
Under different cultural contexts,the interpersonal distance differs slightly,but its basic laws are the same.When conversing,people in love lean very close to each other,acquaintances lean closer than strangers,females lean closer than males,and extraverts lean closer than introverts.In life,harmonious interpersonal relationships are set upon proper interpersonal distances,and some conflicts start from improper interpersonal distances.
- 1.
According to the text,the strangers standing close to each other in a crowded bus may_________.
- A.try to keep a distance away
- B.feel uneasy
- C.feel nervous
- D.be rude to each other
- A.
- 2.
The distance between a teacher and students in class belongs to _________.
- A.intimate distance C.personal distance
C.social distance D.public distance
- A.
- 3.
The interpersonal distance between two people is mainly determined by _________.
- A.how familiar they are with each other
- B.their relationship in a special activity
- C.their characters
- D.their cultural background
- A.
- 4.
To keep proper interpersonal distance is important because _________.
- A.it makes people feel respected or loved
- B.it helps to protect privacy
- C.wrong interpersonal distance may result in misunderstanding
- D.improper interpersonal distance may hurt others
- A.
Interpersonal Distance
With the outbreak of SARS,everyone tried to avoid coming into close contact with each other.In those days,interpersonal distance increased,“close contact” almost became synonymous with “danger”,and even children couldn’t have close contact with their mothers.Now SARS has disappeared,and we return back to normal living again.Then,how can we do handle interpersonal distance in our everyday lives?
Studies show that interpersonal distance can be divided into 4 different types:intimate distance,personal distance,social distance,and public distance.
Intimate distance is the interpersonal distance of a person with the people closest to him or her.It ranges from 0 to 45 cm.When a stranger comes within this distance,a person will have strong negative reaction.In crowded buses,strangers usually maintain rigid poses and try to avoid body contact,but couples,lovers,children and their mothers usually lean close to each other.Intimates who aren’t able to live close together for a long time can become alienated.Also,touching is also very important.A contrast test shows that the nervous systems of babies who are often caressed by their mothers develop much faster and their weight increases faster,by 47%,than that of other babies.
Personal distance ranges from 45 cm to 1 m.People can converse genially at this distance without invading each other’s personal space.When friends and acquaintances meet on the street,they usually greet and converse at this distance.
Social distance generally ranges from 1 m to 3 m.Among this range,1-2 m is usually the distance in which people deal with private affairs in social activities.For example,when you get money from banks,in order to protect your privacy,other customers are required to stand at least 1 m away from you.2-3.5 m is a farther social distance.Business talks usually occur at this distance.Besides talking,proper eye contact is also indispensable.Otherwise,each side will feel disrespected.
Public distance is usually used in public gatherings.It generally ranges from 3.5 m to about 7 m.Beyond this range,people can’t communicate using a normal voice.In classrooms,experienced teachers usually leave their lecture platforms to enhance their teaching.
Under different cultural contexts,the interpersonal distance differs slightly,but its basic laws are the same.When conversing,people in love lean very close to each other,acquaintances lean closer than strangers,females lean closer than males,and extraverts lean closer than introverts.In life,harmonious interpersonal relationships are set upon proper interpersonal distances,and some conflicts start from improper interpersonal distances.
According to the text,the strangers standing close to each other in a crowded bus may_________.
A.try to keep a distance away B.feel uneasy
C.feel nervous D.be rude to each other
The distance between a teacher and students in class belongs to _________.
A.intimate distance C.personal distance
C.social distance D.public distance
The interpersonal distance between two people is mainly determined by _________.
A.how familiar they are with each other B.their relationship in a special activity
C.their characters D.their cultural background
To keep proper interpersonal distance is important because _________.
A.it makes people feel respected or loved
B.it helps to protect privacy
C.wrong interpersonal distance may result in misunderstanding
D.improper interpersonal distance may hurt others
查看习题详情和答案>>Number sense is not the ability to count. It is the ability to recognize a 1 in number. Human beings are born with this ability. 2 , experiments show that many animals are, too. For example, many birds have good number sense. If a nest has four eggs and you remove one, the bird will not 3 .However, if you remove two, the bird 4 leaves. This means that the bird knows the 5 between two and three.
Another interesting experiment showed a bird's 6 number sense. A man was trying to take a photo of a crow（乌鸦）that had a nest in a tower, but the crow always left when she saw him coming. The bird did not 7 until the man left the tower. The man had an 8 .He took another man with him to the tower. One man left and the other stayed, but they did not 9 the bird. The crow stayed away until the second man left, too. The experiment was 10 with three men and then with four men. But the crow did not return to the nest until all the men were 11 .It was not until five men went into the tower and only four left that they were 12 able to fool the crow.
How good is a human's number sense? It's not very good. For example, babies about fourteen months old almost always notice if something is taken away from a 13 group. But when the number goes beyond three or four, the children are 14 fooled.
It seems that number sense is something we have in common with many animals in this world, and that our human 15 is not much better than a crow's.
1. A．rise B．pattern C．change D．trend
2. A．Importantly B．Surprisingly C．Disappointedly D．Fortunately
3. A．survive B．care C．hatch D．notice
4. A．generally B．sincerely C．casually D．deliberately
5. A．distance B．range C．different D．interval
6. A．amazing B．annoying C．satisfying D．disturbing
7. A．relax B．recover C．react D．return
8. A．appointment B．excuse C．idea D．explanation
9. A．fool B．hurt C．catch D．kill
10. A．reported B．repeated C．designed D．approved
11. A．confused B．gone C．tired D．drunk
12. A．gradually B．luckily C．strangely D．finally
13. A．single B．small C．local D．new
14. A．seldom B．temporarily C．merely D．often
15. A．sight B．nature C．ability D．belief
查看习题详情和答案>>
Number sense is not the ability to count. It is the ability to recognize a 1 in number. Human beings are born with this ability. 2 ，experiments show that many animals are, too. For example, many birds have good number sense. If a nest has four eggs and you remove one, the bird will not 3 . However, if you remove two, the bird 4 leaves. This means that the bird knows the 5 between two and three.
Another interesting experiment showed a bird's 6 number sense. A man was trying to take a photo of a crow(乌鸦)that had a nest in a tower, but the crow always left when she saw him coming. The bird did not 7 until the man left the tower. The man had an 8 .He took another man with him to the tower. One man left and the other stayed, but they did not 9 the bird. The crow stayed away until the second man left, too. The experiment was 10 with three men and then with four men. But the crow did not return to the nest until all the men were 11 .It was not until five men went into the tower and only four left that they were 12 able to fool the crow.
How good is a human's number sense? It's not very good. For example, babies about fourteen months old almost always notice if something is taken away from a 13 group. But when the number goes beyond three or four, the children are 14 fooled.
It seems that number sense is something we have in common with many animals in this world, and that our human 15 is not much better than a crow's.
1. A. rise B. pattern C. change D. trend
2. A. Importantly B. Surprisingly C. Disappointedly D. Fortunately
3. A. survive B. care C. hatch D. notice
4. A. generally B. sincerely C. casually D. deliberately
5．A. distance B. range C. different D. interval
6．A. amazing B. annoying C. satisfying D. disturbing
7. A. relax B. recover C. react D. return
8. A. appointment B. excuse C. idea D. explanation
9. A. fool B. hurt C. catch D. kill
10.A. repo B. repeated C. designed D. approved
11.A. confused B. gone C. tired D. drunk
12.A. gradually B. luckily C. strangely D. finally
13. A. single B. small C. local D. new
14. A. seldom B. temporarily C. merely D. often
15. A. sight B. nature C. ability D. belief
查看习题详情和答案>>