Electrical devices(仪器)could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking , British scientist Max Donelan and other scientists in Canada and the United States developed the device.
The device connects to a person’s knee. As the person walks ,the device captures energy each time the person slows down. To do this ,the device helps with the slowing sown movement of the leg, the movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also he used in hospitals to operate heart pacemakers(起博器), it could even be used to assist in the movement of robotic arms and legs.
The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, but the researchers hope to make a lighter, less costly version, An improved version should be ready in one year.
The developers hope the device will one day help developing countries; nearly twenty five percent of people around the world live without electric power.
A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania, He created a bag carried on a person’s back that also produces power from walking. The knee device does not produce as much electricity as the bag, but the bag requires the walker to carry a load of twenty to thirty kilograms.. The second paragraph mainly talks about
| A．who developed the device | B．how the device works |
| C．several possible uses for the devices | D．how much electricity the device can produce |
. What is the disadvantage of the experimental version of the device?
| A．It is too heavy for the walker to bear | B．It is too complex for people to use |
| C．It is too expensive for most people to afford | D．It will slow down one’s walking speed |
. Compared with the device designed by Larry Rome, this new device
| A．produces power without adding more loads to the walker |
| B．can produce more power in a much shorter time |
| C．needs to be equipped with a battery |
| D．can help the walker walk faster |
. From the passage, we can learn that the electrical device can
| A．help housewives operate the washing machine |
| B．make it much easier for us to go online |
| C．produce more electricity than that invented by Larry Rome |
| D．be applied in medical fields to operate heart pacemakers |
. What would be the best title for the passage
A. First device powered by walking will soon be on the market
B. Advanced technology brings in a new way to operate heart pacemakers
C. Device gives new meaning to the idea of power walking
D Human energy will become a main source of electricity
Sunny English Club
For students
16:00--18:00 Every Saturday
200 Yuan a month
9 Zhou Yu Street
Tel: 3785290
Foreign teachers, English songs and films and more!
Ocean Museum
9:00--17:00 From Thursday to Sunday
Ticket: 50 yuan
132 Xue Yuan Street
Tel: 5439871
Show you a full picture of sea lives!
Health Centre
9:00--17:30
16 Yong Le Street
Tel: 3801451
Free examinations for those over 70
Give you good advice to keep healthy!Sunny English Club is for _______.
| A．nurses | B．policemen |
| C．businessmen | D．students |
You will pay ________ if you want to stay in the English club for a month.
| A．200 yuan | B．300 yuan |
| C．400 yuan | D．100 yuan |
One can get free examinations in Health Centre if he is ________.
| A．9 | B．17 |
| C．67 | D．73 |
If you are interested in the life of fish, you should go to________.
| A．Health Centre | B．Ocean Museum |
| C．Sunny English Club | D．16 Yong Le Street |
When can you go to Ocean Museum?
| A．On Monday | B．On Tuesday |
| C．On Wednesday | D．On Saturday |
Dinner customs (风俗) are different around the world. If you are a dinner guest (客人) in Ghana(非洲的加纳), this information will help you.
In Ghana, dinner is usually from four in the afternoon to six in the evening. But there are no strict rules about time in Ghana. Whenever a guest arrives, a family offers food.
When you go to a home, the host takes you to the living room first. At this time everyone welcomes you. Then you go to the dinner room. There you wash your hands in a bowl of water. All the food is on the table.
In Ghana you usually eat with your fingers. You eat from the same dish as everyone else. But you eat from one side of the dish only. It is not polite to get food from the other side of the dish. After dinner, you wash your hands again in a bowl of water.
Most meals in Ghana have a dish called fufu. People in Ghana make fufu from the powder（粉末） of some plants. Sometimes they cut the fufu with a saw（锯） because it is very hard and like rubber（橡胶）. You must chew fufu well, or you can get sick. You eat fufu with fingers of your right hand only.If you are a dinner guest to a family in Ghana, you’re first ________.
| A．told to wash your hands |
| B．taken to the dinning-room |
| C．told some strict rules about dinner |
| D．taken to the living-room |
In the fourth paragraph, the writer wants to tell us ________
| A．what to eat in Ghana |
| B．how much time to spend on a dinner. |
| C．the way of eating |
| D．different food at a dinner |
The word “chew” in the last paragraph means ________
| A．smell | B．taste |
| C．presses with your hands | D．crush with your teeth |
Let’s say a person gets up at 7:00 in the morning and goes to bed at 11:00 at night. He comes home from work about 6:30, and by the time he has finished with dinner it is after 8:00. He steps outside in the summer to relax — but it’s already getting dark! Not much time to enjoy the summer day.
Now suppose you set the clock ahead one hour. This person still does everything at the same time — but this time, when he steps out at 8:00 there’s still plenty of light to enjoy. An hour of daylight has been “saved” for him!
Daylight saving time doesn’t, of course, add any hours to a day. This is impossible. All it does is to increase the number of useful hours of daylight during the seasons when the sun rises early.
Daylight saving is most popular in cities. It allows the closing of offices, shops, and factories at the end of the working day while the sun is still high. Farmers, who do their work by sun time, usually do not observe daylight saving time. They cannot work in the field before the morning dew(露水) has dried or after it appears in the evening.
Did you know who first thought of daylight saving time? It was Benjamin Franklin! When he was living in France in the 18th century, he suggested the idea to the people in Paris. But it was not adopted then.
Daylight saving laws were first passed during World WarⅠ, when materials for making electricity was hard to find, and when it was necessary to save on artificial light. With daylight saving, the bedtime of many people comes soon after it gets dark, while without it, if people stay up until the same hour they may have to use artificial light.
Germany was the first country to adopt daylight saving time in 1915. Then England used it in 1916, and the United States adopted it in 1918.What does the underlined word “artificial” mean?
| A．natural | B．man-made |
| C．bright | D．sun |
What’s the purpose of adopting daylight saving time?
| A．To have more artificial light. |
| B．To have one more hour to work. |
| C．To make better use of daylight in certain seasons. |
| D．To have one more hour to rest. |
Which of the following is true according to the passage?
| A．Once the idea of daylight saving time is proposed, it was adopted. |
| B．The idea of daylight saving time went through a long process of being adopted. |
| C．It was a French scientist that put forward the idea of daylight saving time. |
| D．The idea of daylight saving time didn’t make any difference at all. |
What can be inferred from the passage?
| A．Winter is a good season for daylight saving time. |
| B．Daylight saving time is especially good for wars. |
| C．Daylight saving time is good for anyone in any places. |
| D．Not all seasons are good for daylight saving time. |
It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can’t fix the damage. Sometimes they are afraid to try something to help because it is dangerous to work on the brain. The doctors might make the person worse if he operates on the brain.
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, and then he operated on them. He made the monkeys' blood go through a machine. The machine cooled the blood. Then the machine sent the blood back to the monkeys' brains. When the brain’s temperature was 10°C, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
The biggest difficulty in operating on the damaged brain is that _______.
| A．the time is too short for doctors |
| B．the patients are often too nervous |
| C．the damage is extremely hard to fix |
| D．The blood cooling machine might break down |
The brain operation was made possible mainly by _______.
| A．taking the blood out of the brain |
| B．trying the operation on monkeys first |
| C．having the blood go through a machine |
| D．lowering the brain’s temperature |
With Dr. White’s new idea, the operation on the damaged brain ______.
| A．can last as long as 30 minutes |
| B．can keep the brain’s blood warm |
| C．can keep the patient’s brain healthy |
| D．can help monkeys do different jobs |
The story is about two old people named David and Rosy Jackson. Both of them had very bad memories. For example, Rosy would forget to cook dinner or take vegetables home after paying for them. David would show up for work on Sundays, thinking it was Monday. One winter they were to take a long plane trip. When they arrived at the airport, there were only ten minutes left. In that situation, anyone would get into the plane right away. But David and Rosy didn’t do so. They went to buy some flight insurance(保险) instead. Immediately after they put a two-pound note into a machine, their policy (保险单) came out.
“Who would get the money if the plane crashed, I wonder?” asked Rosy. “My mother, of course,” her husband replied. “We should post the policy to her. Now, be quick! Give me a stamp, will you?” he said to Rosy. “The plane is going to take off in another minute.” David put the stamp on the envelope, dropped it into a postbox, and suddenly he let out a cry.
What do you suppose happened to him? He had posted their plane tickets to his mother.Rosy is David’s ______.
| A．friend | B．mother |
| C．sister | D．wife |
This passage tells us that David and Rosy ______.
| A．were always short of time |
| B．always did everything in a great hurry |
| C．were very forgetful |
| D．usually worked on Sundays |
David meant to post his mother _____.
| A．two plane tickets | B．a two-pound note |
| C．the flight insurance | D．an empty envelope |
Mr Jackson made such a foolish mistake because ______.
| A．he was worried about his mother |
| B．he had forgotten to buy a stamp |
| C．he was worried about this flight |
| D．his memory was poor and he posted the letter in a great hurry |
What’s the best title of the passage?
| A．A forgetful old couple. |
| B．Two plane tickets. |
| C．A pleasant flight. |
| D．A plane crash. |
粤公网安备 44130202000953号