Light travels at a speed which is about a million times faster than the speed of sound. You can get some idea of this difference by watching the start of a race. If you stand some distance away from the starter, you can see smoke from his gun before the sound reaches your ears.
This great speed of light produces some strange facts. Sunlight takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light that you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km. per minute. In some cases, the light from one of tonight’s stars had started on its journey to you before you were born.
Thus, if we want to be honest, we can’t say, “The stars are shining tonight.” We have to say instead, “The stars look pretty. They were shining four years ago, but their light has only just reached the earth.” Light speed is ______ sound speed
A.as fast as | B.a million times slower than |
C.about millions of times faster than | D.about a million times faster than |
If you stand 200 meters away from a man who is firing a gun to start a race, you will find out that ______.
A.you can hear the sound before you see the smoke |
B.the sound does not travel as fast as light |
C.the sound will reach you before the man fires |
D.sound travels about a million times faster than light |
Sunlight obviously (明显地) ______ than the light of the moon
A.has to travel a greater distance | B.moves less quickly |
C.travels much more quickly | D.is less powerful(有力的) |
The scientific way of saying "The stars are shining tonight" should be ______.
A.the stars have been shining all the time |
B.the stars seen tonight will shine four years later |
C.the stars were shining long ago but seen tonight |
D.the starlight seen today could be seen four years ago |
At 21,Ricardo Semler became boss of his father's business in Brazil,Semco,which sold parts for ships. Semler Junior worked like a mad man,from 7:30 am,until midnight every day. One afternoon,while touring a factory in New York,he broke down. The doctor who treated him said,"There's nothing wrong with you. But if you continue like this, you'll find a new home in our hospital. "Semler got the message. He changed the way he worked. In fact,he changed the ways his employees worked too.
He let his workers take more responsibility so that they would be the ones worrying when things went wrong. He allowed them to set their own salaries,and he cut all the jobs he thought were unnecessary,like receptionists and secretaries. This saved money and brought more equality(平等)to the company. "Everyone at Semco,even top managers,meets guests in reception,does the photocopying,sends faxes,types letters and dials the phone."
He completely reorganized the office:instead of walls,they have plants at Semco,so bosses can't shut themselves away from everyone else. And the workers are free to decorate their workspace as they want. As for uniforms,some people wear suits and others wear T-shirts.
Semco has flexible (灵活的)working hours:the employees decide when they need to arrive at work. Also,Semco lets its workers use the company's machines for their own projects,and makes them take holidays for at least thirty days a year.
It sounds perfect,but does it work? The answer is in the numbers:in the last six years,Semco's revenues (收入)have gone from $35 million to $212 million. The company has grown from eight hundred employees to 3,000. Why?
Semler says it's because of "peer pressure". Peer pressure makes employees work hard for everyone else. If someone isn't doing his job well,the other workers will not allow the situation to continue. In other words,Ricardo Semler treats his workers like adults rather than children, and expects them to act like responsible adults. And they do.Why did Semler change the way he and his employees worked?
A.Because he went crazy because of overwork. |
B.Because he had to receive treatment in hospital. |
C.Because his father asked him to. |
D.Because the doctor warned him of the danger of overwork. |
Semler made a variety of changes in his company Except that__________.
A.the number of the employees is reduced to save money |
B.the employees can take only 30 days off for holiday every year. |
C.flexible working hours were introduced |
D.the employees enjoyed a lot of freedom |
What’s the main idea of Paragraph five?
A.Ricardo Semler’s new management method succeeded. |
B.Ricardo Semler’s idea sounded perfect but not practical. |
C.The company earned a lot of money. |
D.The reason for his success. |
In his company, what does Ricardo Semler value most?
A.freedom | B.rules | C.responsibility | D.hard work |
For some people, music is no fun at all. About four percent of the population is what scientists call “amusic.” People who are amusic are born without the ability to recognize or reproduce musical notes (音调). Amusic people often cannot tell the difference between two songs. Amusics can only hear the difference between two notes if they are very far apart on the musical scale.
As a result, songs sound like noise to an amusic. Many amusics compare the sound of music to pieces of metal hitting each other. Life can be hard for amusics. Their inability to enjoy music set them apart from others. It can be difficult for other people to identify with their condition. In fact, most people cannot begin to grasp what it feels like to be amusic. Just going to a restaurant or a shopping mall can be uncomfortable or even painful. That is why many amusics intentionally stay away from places where there is music. However, this can result in withdrawal and social isolation. “I used to hate parties,” says Margaret, a seventy-year-old woman who only recently discovered that she was amusic. By studying people like Margaret, scientists are finally learning how to identify this unusual condition.
Scientists say that the brains of amusics are different from the brains of people who can appreciate music. The difference is complex, and it doesn’t involve defective hearing. Amusics can understand other nonmusical sounds well. They also have no problems understanding ordinary speech. Scientists compare amusics to people who just can’t see certain colors.
Many amusics are happy when their condition is finally diagnosed. For years, Margaret felt embarrassed about her problem with music. Now she knows that she is not alone. There is a name for her condition. That makes it easier for her to explain. “When people invite me to a concert, I just say, ‘No thanks, I’m amusic,’” says Margaret. “I just wish I had learned to say that when I was seventeen and not seventy.” Which of the following is true of amusics?
A.Listening to music is far from enjoyable for them. |
B.They love places where they are likely to hear music. |
C.They can easily tell two different songs apart. |
D.Their situation is well understood by musicians. |
According to paragraph 3, a person with “defective hearing” is probably one who ______.
A.dislikes listening to speeches | B.can hear anything nonmusical |
C.has a hearing problem | D.lacks a complex hearing system |
In the last paragraph, Margaret expressed her wish that ______.
A.her problem with music had been diagnosed earlier |
B.she were seventeen years old rather than seventy |
C.her problem could be easily explained |
D.she were able to meet other amusics |
What is the passage mainly concerned with?
A.Amusics’ strange behaviours. |
B.Some people’s inability to enjoy music. |
C.Musical talent and brain structure. |
D.Identification and treatment of amusics. |
Imagination and fantasy can play an important role in achieving the things we fear. Children know this very well. Fred Epstein, in his book If I Make It to Five, tells a story he heard from one of his friends about Tom, a four-year-old boy with a cancer in his back bone. He came through several operations and a lot of pain by mastering his imagination.
Tom loved to pretend, and he particularly loved to play superheroes. Dr. Epstein explained that it was actually a brilliant way for his young mind to handle the terrifying and painful life he led.
The day before his third trip to the operating room, Tom was terribly afraid. “Maybe I could go as Superman,” he whispered to his mom. Hearing this, the mother hesitated for a while. She had avoided buying the expensive costume (戏装), but finally she agreed.
The next day Tom appeared as the powerful Superman, showing off through the hospital halls and coolly waving his hand to the people greeting him along the way. And Tom, with the strength of his fantasy, successfully made it through the operation.
The power of imagination need not be reserved for children only. We all have the power to use our fantasies to attempt things we never thought possible, to go through those things that seem impossible, and to achieve what we never believed we could. Just as Dr. Epstein puts it, “If you can dream it, you can do it.”
It doesn’t mean that you should dress as a superhero for your next job interview. But, next time you are tested in a way that seems impossible, imagine what it would take to overcome it. Become the person you need to become to win over your challenge (挑战) and do it in your mind first. So, let your imagination run wild, and dare to dream.What do we know about Tom?
A.He was seriously ill |
B.He was a dishonest boy. |
C.He was crazy about magic. |
D.He was Dr. Epstein’s patient. |
What can be inferred about Tom’s mother?
A.She was a rich lady. |
B.She wanted to get Tom through the pain. |
C.She wanted Tom to be a superhero. |
D.She refused Tom’s request. |
In the last paragraph, you are advised ______.
A.to go through some difficult tests |
B.to wake up from your wild dreams |
C.to become a powerful person in your mind |
D.to wear expensive clothes for job interviews |
What is the purpose of the passage?
A.To tell us an interesting story. |
B.To help us make right decisions. |
C.To advise us to care about children. |
D.To encourage us to use our imagination. |
The morning had been a disaster. My tooth was aching, and I’d been in an argument with a friend. Her words still hurt:“The trouble with you is that you won’t put yourself in my place. Can’t you see things from my point of view?” I shook my head stubbornly—and felt the ache in my tooth. I’d thought I could hold out till my dentist came back from holiday, but the pain was really unbearable. I started calling the dentists in the phone book, but no one could see me immediately. Finally, at about lunch time, I got lucky.
“If you come by right now,” the receptionist said, “the dentist will fit you in.”
I took my purse and keys and rushed to my car. But suddenly I began to doubt about the dentist. What kind of dentist would be so eager to treat someone at such short notice? Why wasn’t he as busy as the others?
In the dentist’s office, I sat down and looked around. I saw nothing but the bare walls and I became even more worried. The assistant noticed my nervousness and placed her warm hand over my ice-cold one.
When I told her my fears, she laughed and said, “Don’t worry. The dentist is very good. ”
“How long do I have to wait for him?” I asked impatiently.
“Come on, he is coming. Just lie down and relax. And enjoy the artwork,” the assistant said.
“The artwork?” I was puzzled.
The chair went back, suddenly I smiled. There was a beautiful picture, right where I could enjoy it: on the ceiling. How considerate the dentist was! At that moment, I began to understand what my friend meant by her words.
What a relief! Which of the following best describes the author’s feeling that morning?
A.Happy. | B.Nervous. | C.Satisfied. | D.Upset. |
What made the author begin to doubt about the dentist?
A.The dentist’s agreeing to treat her at very short notice. |
B.The dentist’s being as busy as the other dentists. |
C.The surroundings of the dentist’s office. |
D.The laughing assistant of the dentist. |
What did the author learn from her experience most probably?
A.Strike while the iron is hot. |
B.Have a good word for one’s friend. |
C.Put oneself in other’s shoes. |
D.A friend in need is a friend indeed. |
American parents usually think that their child should not have more pocket money than the children with whom he regularly connects no matter they are wealthier or not than he.
Whatever the pocket money is, its entire use is not controlled by the parents, because a child learns to use money correctly only through dealing with it himself. If a seven-year-old child gets a quarter as a week pocket money and is made to put it all in his piggy bank to save it up, he gets no idea what the real use for the money is. He gets the shiny coins and they soon disappear. The idea of a bank account(在银行开户) is too early for so small a child, although he can be made understand and enjoy saving his coins-not all of them, only a part of what he receives-to buy something he especially wants. By the time he is eight, he is old enough to take part in the opening of his own savings account, parents may take him to the bank, open a saving account for him, and encourage him to put a certain quantity(数量) of money he receives as gifts into the bank and watch his bank saving grow as entry by entry(存入)is made. He will be saving, earning, and spending suitable quantities all along in order to learn how to manage money and to keep him in a favorable position with his friends. The boy is a sorry child who can't join his fellows in a sweet shop once in a while because he has to save every cent he gets or earns for some big unknown projects his parents have chosen for him. What does the underlined word "piggy bank" refer to?
A.Something in the shape of a pig for saving coins. |
B.A kind of bank run by the children. |
C.A bank whose building looks like a pig. |
D.A bank for children's saving. |
Which of the following statement is NOT true?
A.Whatever the pocket money is, its entire use is not controlled by American parents. |
B.If an eight-year-old child receive 10 dollars as his birthday gift, he probably have most of it saved in the bank. |
C.American parents never interfere(干涉) with their children's use of their pocket money. |
D.American parents don't usually give their children much pocket money. |
Why does the author think the boy is a sorry one if he saves every cent he gets or earns?
A.Because he can not manage his money and it keeps him in an unfavorable position. |
B.Because he can not learn the use of money through spending it himself. |
C.Because he can not have any other choice but to save, earn or spend money. |
D.Because he can not join the fellow in a sweet shop once in while. |