Today, ultrasonic(超声的) waves are being put to work in laboratories and factories. If an ultrasound generator is placed in a liquid, the waves move the liquid back and forth hundreds of thousands of times each second. This causes materials to mix quickly or to dissolve(使分解，使溶解) in liquids. Paint manufacturers(制造商) use ultrasound to do a better job of blending colors. The companies that make film for your camera find that mixing chemicals by the use of sound waves will produce a more sensitive film.
The new lightweight(轻量的) type of washing machine uses ultrasonic waves to get clothes clean. Its special ultrasound generator is put into a pail of soapy water containing the soiled clothes. The sound waves drive the soapy water back and forth through the cloth so fast that everything is soon clean. There is also a new kind of dishwasher that works in much the same way.
Ultrasonic waves can shake a liquid so fast that tiny holes form all through it. The liquid is actually torn apart by this action. Almost as soon as these holes are made, they fall together again. The result is a powerful pounding action. In the dairy industry this is used for the double purpose of making homogenized(使均匀，使匀质) milk and sterilizing(使无菌) it at the same time. If you look at some raw milk with a microscope, you find that it is made up of little drops of butter fat floating around in a watery liquid. In order to make milk easier to digest, these fat droplets(微粒) may be broken up by forcing the milk through very small openings. The result is called homogenized milk. When the ultrasonic method is used, the sound waves not only break up the droplets but also kill the germs in the milk by pounding them to pieces. (from www.nmet84.com)
8. Why does a paint manufacturer use ultrasound to do a better job of blending colors?
A. Because it is cheap to use ultrasound to blend colors.
B. Because the waves move the liquid so quickly that it can make materials mix quickly or dissolve in liquids.
C. Because they can mix chemicals by the use of sound waves.
D. Because the waves can clean the paint.
9. What properties does ultrasound wave have?
A. Homogenizes and sterilizes the milk. B. Mix materials and break droplets.
C. Kill germs and sterilize milk. D. Move liquids quickly.
10. What exists in the raw milk?
A. Little drops of butter fat. B. Small holes. C. Fat droplets and germs. D. Chemicals.
11. Where is ultrasound wave not used?
A. In the paint manufacture. B. In the shop mixing bread flour.
C. In the film-making company. D. In the dairy industry.
Minh Pham was born in Vietnam. He left there when he was 21 years old. Minh has been in America for almost two years. There is still much he does not understand about America.
Once, Minh was in a supermarket. He saw an old man and an old woman. They wanted a box of cereal（麦片）.The box was on a high shelf. The man and the woman couldn’t reach it. Minh saw a stepladder. He got on the ladder and got the box. He handed it to the elderly couple. They thanked him.
“Where are your children?” asked Minh. “Why don’t they help you buy food?” “Our children have their own lives,” said the man and the woman. “We like to be independent.” Minh doesn’t think this is right. In his country, children help their parents. Minh gave the elderly couple his phone number. He told them to call him if they needed help. One night they asked Minh to dinner, but they never asked him for help.
One day, Minh was walking with a Vietnamese friend. The two men were going to a movie. Minh wanted to go to a restaurant first. Minh took his friend’s hand. He pulled him towards the restaurant. People on the street stared at Minh. In Vietnam, friends often hold hands. Minh found that the people in America are not used to men holding hands.
Minh Pham is going through a process（过程） known as resocialization. Socialization（社会化） is the process in which a person learns to live in a society. Everyone goes through this process. Minh went through it when he lived in Vietnam. But the Vietnamese way of life is rather different from the American way of life. When Minh came to America, he had to learn a new way of life. He had to learn how to live in a new society. Minh has learned a lot about American life in two years. He still has a lot to learn. The process of resocialization can take many years.The main idea of the passage is that socialization is the way in which a person ______.
| A．learns to live in a society |
| B．travels from one country to another |
| C．learns to act independently |
| D．learns about their country |
The passage states that Minh didn’t understand why the elderly man and woman were not ______.
| A．helped by their children | B．shopping for their children |
| C．holding hands | D．using a stepladder |
According to the passage, socialization happens to ______.
| A．only the Vietnamese in America | B．only Americans |
| C．only older people | D．everyone |
The underlined word “resocialization” means ______.
| A．keeping one’s own way of life |
| B．keeping up with others |
| C．a process of learning how to live in a new society |
| D．understanding a new culture |
One Canada, Two Languages
Canada is one of the few nations in the world to have two official languages: English and French. There are 10 provinces in the country but only one of these—Quebec is known as “French Canada”. This is because it was founded by French explorers while British adventurers discovered the rest.
Canada left the British empire（帝国） in 1867 to become an independent country, and English and French have been recognized as the official languages ever since.
Most people speak English as their first language and the two national television networks broadcast in English throughout the country. Apart from in Quebec and a few places on the east coast, French television is very rare.
The same goes for traffic signs and menus. For example, outside of Quebec, there are only a few places where you’ll see traffic signs in French. In restaurants, it’s almost impossible to find French on the menu unless you are in the heartland（中心地带）of French Canada. However, all products sold in Canada must, by law, have labels（标签）and instructions in both languages.
In Canada’s English speaking provinces, official bilingualism（双语） means that students can choose to complete a special French language course. Under this programme, they are taught most of their subjects in French.
If a student begins the course in kindergarten（幼儿园） or Grade One, it is likely that all their lessons will be in French. However, if they start at junior high school,25 per cent of the teaching will continue to be in English.How many provinces are there in Canada?
| A．Ten. | B．Nine. | C．Eleven. | D． Two. |
Which country controlled Canada before its independence?
| A．France. | B．Britain. | C．America. | D．Germany. |
Which of the following sentences is right?
| A．English is the only official language, though French is also spoken there. |
| B．The two national television networks broadcast both in English and French. |
| C．All products sold in Canada must, by law, have labels and instructions in both English and French. |
| D．The lessons in kindergarten or Grade One are likely to be only in English. |
Today there are policemen everywhere, but in 1700, London had no policemen at all. A few old
men used to protect the city streets at night and they were not paid.
In 1750, Henry Fielding started to pay a group of people to stop thieves. They were like
policemen and were called "Bow Street Runners" because they worked near Bow Street.
Fifty years later, there were 120 "Bow Street Runners", but London had become very big and
needed more policemen. So in 1829, London Police Force was started with 3,000 officers. Until
1920 all the police in London were men.Who protected London in 1700? (回答词数不超过4个)
When was London Police Force started? ( 回答词数不超过2个)
Are all the London police men now? (回答词数不超过1个)
注意：每空不超过3个单词。
Frederick M. Hess is the director of education policy studies in American. He says that a long summer vacation doesn't make sense in today's world.
In a summer vacation, millions of kids spend valuable time sending messages, watching TV, playing video games and doing shopping in the mall. These activities are putting their futures at risk.
Summer vacation once made sense in the past when you didn't need an education to get a good job. But now things have changed. For today's students, academic(学术的) skills are important to students' future success, but such skills are affected in the summertime. Most American schools offer up to thirteen weeks summer vacation.
Summer vacation also causes challenges for today's families. In the 1960s, more than 60% of families had a stay-at-home Mom. Now two-thirds of American children live in households where every adult works. For these families, summer vacation can be more burden than break. Someone must watch the kids.
“A longer school year does not have to be hard and boring work. Instead, it should allow teachers to give richer and more imaginative lessons,” Frederick M. Hess suggested, “Schools would have more time to devote to athletics, languages, music and the arts”.
Summer vacation can be a grand thing. But in the 21st century, it may also be outdated.
Title: Long Summer Vacation
| Theme |
A |
|
| Basic Information |
Vacation length |
|
| Students’ |
·Sending messages and watching TV ·Playing video games ·Doing shopping |
|
| Disadvantages |
Putting student’s academic futures at risk |
Affect academic |
| Causing challenges for families |
Make parents watch kids at home |
|
| Students should study more imaginative lessons such as athletics, languages, music and the arts. |
||
| Conclusion |
Summer vacation can be both grand and outdated |
Winter is dangerous because it’s so difficult to know what is going to happen and accidents take place so easily. Fog can be waiting to meet you over the top of a hill. Ice might be hiding under the melting (融化) snow, waiting ahead to send you off the road. The car coming to you may suddenly slip（滑） across the road.
Rule No.1 for driving on icy roads is to drive smoothly (平稳地). Sudden movements can make a car very difficult to control. So every time you either start or stop your car, increase or reduce your speed, you must be as gentle and slow as possible. Suppose you are driving with a full cup of hot coffee on the seat next to you. Drive so that you wouldn’t spill (溅) it.
Rule No.2 is to pay attention to what might happen. The more ice there is, the further down the road you have to look. Test how long it takes to gently stop your car. Remember that you may be driving more quickly than you think. Generally, allow twice of your usual stopping distance when the road is wet, three times this distance on snow than usual, and even more on ice. Try to stay in control of your car at all time and you will not get into trouble.The writer tries to _____ in this passage.
| A．show his dislikes about bad winter weather |
| B．give information about winter weather |
| C．ask people not to drive in winter |
| D．advise people about safe driving in winter |
According to the passage, the writer thinks that _______.
| A．people should not drive in the snow |
| B．drivers should think more about problems in winter driving |
| C．people drive too fast in winter |
| D．winter drivers should stop their cars less |
In the passage the writer talks about a cup of coffee ______.
| A．to show how important smooth movements are |
| B．to ask the drivers to bring some soft drinks with them |
| C．to tell the drivers to be more relaxed |
| D．to show how it can be spilled |
Which of the following is NOT true?
| A．Traffic accidents take place easily in winter. |
| B．Fog and melting snow often cause car accidents. |
| C．The stopping distance on ice is as long as the usual one. |
| D．In winter you should drive your car with great care. |