Put an ice cube from your fridge into a glass of water. You have a piece of string(線) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.
You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.
First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze again. After a minute or two you may raise the piece of string and with it you will raise your piece of ice!
This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don’t put enough salt, the water will freeze again.
小題1: We must use _______ when we carry out this experiment.
A.fridge B.some foodC.a(chǎn) table D.some salt
小題2: How long will it take to carry out this experiment?
A.More than three minutes.B.Five minutes or so.
C.Only one minute or two.D.About ten minutes.
小題3:What is the task of this experiment?
A.Put the ice cube into the glass of water with the help of the string.
B.Take out the ice cube in the glass of water with the help of the string.
C.Take out the ice cube in the glass of water with your fingers.
D.Put some salt on the ice cube and then put the string across it.
小題4:How many things at least are used in this experiment?
A.Three. B.Four. C.Six.D.Seven.
小題5:We can learn something about _______ from the passage.
A.physics B.biologyC.chemistryD.maths

小題1:D
小題2:C
小題3:B
小題4:B
小題5:C
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:不詳 題型:閱讀理解


Clothes make the man” goes the old saying. Many people believe clothing choices say a lot about character as well as social status.
People adopt some kind of style in daily life, usually because they are trying to fit in with certain surroundings or show their connection to a particular group, says German image consultant Beatrix Isabel Lied. This means that people use clothing to send signals to those around them: The wearer of a black polo-neck sweater (套頭圓領(lǐng)毛衣) might be an artist, an educated man or an architect. Outdoor and nature-loving types tend to choose weatherproof (防風(fēng)雨的)jackets and durable shoes instead. Women usually spend more time on clothes than men.
“Clothing is not only an expression of taste, but also an expression of attitude,” says Lied.
According to style advisor Lisa Zimmermann from Berlin, there is nothing superficial (膚淺的) about judging people by the clothes they wear. “It's about the famous first 10 seconds, which is all it takes to make an impression,” she says.
Apart from material, Zimmermann believes people, whether consciously or unconsciously, choose a color, which they believe suits them and the situation.
Different colors can produce different effects. Black signals a sense of being something special, and it also stands for concentration. Blue, the color of the sky, stands for pragmatism (實(shí)用主義) and intellect (知識(shí)分子). “It is the color of power,” says Zimmermann. Red clothing gets the wearer noticed and can indicate an outgoing character. Yellow stands for cheerfulness and optimism, while pink is naturally the most romantic of colors.
Experts say it is important to be aware of the meanings of particular colors, which can vary a lot between different cultures.
What does the underlined sentence in the first paragraph mean?
Clothes can decide what a man’s job is.
Clothes can tell us whether a person is really a man.
Clothes can tell us about a man’s character and social position.
Clothes can help us choose our life style.
According to Lied, an artist might wear ____________.
A. a black polo-neck sweater               B. weatherproof jackets
C. nature-loving types                         D. a red sweater
Lisa Zimmermann believes____________.
A. there is something wrong with judging people by what they wear
B. there is nothing wrong with judging people by what they wear
C. people usually choose what they believe suits them and the situation consciously
D. people usually choose what they believe suits them and the situation unconsciously
What color stands for concentration?
A. Black.               B. Blue.         C. Red           D. Pink
Which sentence is true according to the passage?
In different cultures, colors mean the same.
In different cultures, colors mean different things.
In different cultures, different colors can produce the same effect.
In different cultures, different colors can produce different effects.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


Botany, the study of plants, occupies a special position in the history of human knowledge. For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest (含糊的) of insight. It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of pre-industrial societies that still exist, a detailed learning of plants and their properties must extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. They have always been enormously important to the welfare of peoples, not only for food, but also for clothing, weapons, tools, eyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognized accurately hundreds of plants and know many properties of each. To them, botany, as such, has no name and is probably not even recognized as a special branch of knowledge at all.
Unfortunately, the more industrialized we become the farther away we move from direct contact with plants, and the less distinct our knowledge of botany grows. Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid. When our Neolithic ancestors, living in the Middle East about 10,000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer productions the next season, the first great step in a new association of plants and humans was taken. Grains were discovered and from them flowed the wonder of agriculture; cultivated crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild and the built up knowledge of tens of thousands of years of experience and close relationship with plants in the wild would begin fade away.
1. Which of the following statements about early humans is expressed in the passage?
A. They probably had extensive knowledge of plants.    
B. They thought there was no need to cultivate crops.     
C. They did not enjoy the study of botany.      
D. They placed great importance on the ownership of property.
2. What does the comment “This is logical.” In the first paragraph mean?
A. There is no clear way to determine the extent of our ancestor’s knowledge of plants.           
B. It is not surprising that early humans had a detailed knowledge of plants.
C. It is reasonable to assume that our ancestors behaved very much like people in pre-industrial societies.       
D. Human knowledge of plants is well organized and very detailed.
3. According to the passage, why has general knowledge of botany begun to fade?
A. People no longer value plants as a useful resource.       
B. Botany is not recognized as a special branch of science.
C. Research is unable to keep up with the increasing numbers of plants.
D. Direct contact with a variety of plants has decreased.
4. In the second paragraph, what is the author’s purpose in mentioning “ a rose, an apple, or an orchid”?
A. To make the passage more poetic.
B. To give an example of plant that are attractive.
C. To give botanical examples that all readers will recognize.
D. To explain the variety of botanical life.
5. According to the passage, what was the first great step toward the practice of agriculture?
A. The invention of agricultural tools and machinery.       
B. The development of a system of names for plants.
C. The discovery of grasses that could be harvested and replanted.         
D. The changing diets of early humans.   

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


The Peppered Moth, a kind of insect, is found in England. It is light brown in color and likes to settle on trees which are also light brown. This makes the moth difficult to be seen and birds are less likely to notice and eat it.
But with the development of industry, smoke from factories began to reach the trees where the moth settled. It made the trees blacker. Then something very strange took place: in industrial areas, the Peppered Moth began to change color. It became darker as well. Although the change took several years, some scientists soon noticed that newly-born moths were a little darker than usual.
A scientist called Kettle Well decided to make a careful study of this. He marked some of the light moths and some of the darker ones, and set them free in the woods near Birmingham, an industrial city. Later he retarget as many the marked moths as possible ( The result was given in the chart ).
Kettle Well’s research was done in the early 1950s. Soon afterwards Britain introduced new laws to reduce smoke and factory pollution.
Can you imagine what would happen to the Peppered Moth as the air became cleaner again? 
 
light moths
darker moths
Moths set free
201
601
Moths recaught
34 ( 16%)
206 ( 34%)
1. The trees where the Peppered Moth settled changed their color because _____________________________.
A. the Peppered Moth changed its color
B. the Peppered Moth couldn’t be easily found on them
C. industry in England developed quickly 
D. the smoke from factories polluted them
2. The Peppered Moth began to change its color in industrial areas because   _____________________________.
A. it changed its color all the time   
B. it was fond of the color of its living place
C. it had to protect itself by doing so 
D. it was a special sort of insect
3. From the results of Kettle Well’s research, we can see that _________________.
A. many more of the light moths were killed or eaten
B. more than one-fifth of the light moths escaped being killed
C. three times as many dark moths were kept safe as light ones
D. more dark moths were killed in industrial areas
4. Kettle Well’s work gives us a good example of _________________________.
A. Air Pollution  B. Choice of Color   C. Laws of Nature  D. Changing Insects
5. As the air became cleaner, _________________________.
A. the number of the light moths increased
B. the total number of the light moths remained unchanged
C. more of the darker moths would be recaught
D. the darker moths changed into the light ones before long

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

New technology links the world as never before. Our planet has shrunk(收縮). It’s now a “global village” where countries are only seconds away by fax or phone or satellite link. And, of course, our ability to benefit from this high-tech communication’s equipment is greatly enhanced by foreign language skills.
Deeply involved with this new technology is a breed of modern businesspeople who have a growing respect for the economic value of doing business abroad. In modern markets, success overseas often helps support domestic(國內(nèi)的) business efforts.
Overseas assignments are becoming increasingly important to advancement within executive(行政的) ranks. The executive stationed in another country no longer need fear being “out of sight and out of mind.” He or she can be sure that the overseas effort is central to the company’s plan for success, and that promotions often follow or accompany an assignment abroad. If an employee can succeed in a difficult assignment overseas, superior will have greater confidence in his or her ability to cope back in the United States where cross-cultural considerations and foreign language issues are becoming more and more common.
Thanks to a variety of relatively inexpensive communications devices with business applications, even small businesses in the United States are able to get into international markets.
English is still the international language of business. But there is an ever-growing need for people who can speak another language. A second language isn’t generally required to get a job in business, but having language skills gives a candidate(候選人) the edge when other qualifications appear to be equal.
The employee posted abroad who speaks the country’s principal language has an opportunity to fast-forward certain negotiations, and can have the cultural insight to know when it is better to move more slowly. The employee at the home office who can communicate well with foreign clients(客戶) over the telephone or by fax machine is an obvious asset to the firm.
小題1:What is the author’s attitude toward high-tech communications equipment?
A.Critical.B.Indifferent.C.Negative.D.Positive.
小題2:With the increased use of high-tech communications equipment, business people_________.
A.have to get familiar with modern technology
B.a(chǎn)re gaining more economic benefits from domestic operations
C.a(chǎn)re placing more importance on their overseas business
D.a(chǎn)re eager to work overseas
小題3: In this passage, “out of sight and out of mind” (Para. 3) probably means _________.
A.being unable to think properly for lack of insight
B.being totally out of touch with business at home
C.missing opportunities for promotion when abroad
D.leaving all care and worry behind
小題4:According to the passage, what is an important consideration of international corporations in employing people today?
A.Connections with businesses overseas.B.Ability to speak the client’s language.
C.Technical know-how.D.Business experience.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


The magnitude 7.9 quake struck Sichuan province on May 12 at around noontime, which may have increased the human death toll because many people were at school, and the school buildings turned out to be not firm enough to collapse because of poor construction. More than 69,000 people have been confirmed dead so far, and more than 374,000 injured, with fears of further disasters because several lakes created by rockfall dams may give way and cause sudden flooding.
Clark Burchfiel, Schlumberger Professor of Geology, and Leigh Royden, professor of geology and geophysics in the Department of Earth, Atmospheric and Planetary Sciences at MIT, have been doing extensive research in that region of China and the Tibetan plateau(高原) for more than two decades, but had found no signs that suggested such a large earthquake might strike the area.
The team operated 25 broadband seismograph (地震儀) stations in this region of western Sichuan for more than a year. "Nobody was thinking there would be a major earthquake in that area," Royden says. "This earthquake was quite unusual, and may have involved a simultaneously(同時(shí)發(fā)生的) severe break of two separate but neighboring faults," she continued.
The region is extremely unusual geologically, Royden says, because of the very steep slopes at the boundary between the Sichuan Basin to the east and the Tibetan plateau to the west. The altitude rises sharply by about 3,500 meters (more than two miles) over a span of only about 50 kilometers (about 30 miles).
The area where the quake occurred is part of the boundary between two of the Earth's structural plates, where the Indian and Asian plates meet in an ongoing collision that has created the Himalayan mountains and the Tibetan plateau. But in central and eastern Tibet, unlike most other areas of continental collision, much of the movement of crust(地殼) is hidden from view. Instead of thickening the entire crust by folding and faulting, the surface of the eastern Tibetan plateau is not deformed(變形的) and is being lifted upward by thickening of a weak crustal layer more than 15 km below the surface.
60. Why did the school buildings collapse in the earthquake, according to the passage?
A. They had too long a history.
B. They were poorly built.
C. They were crowded with students and teachers.
D. They were damaged by the earthquake.
61. Based on Para. 1, why does the writer think that more people will be killed or injured after 
the earthquake?
A. Because there will be more aftershocks after the major quake.
B. Because more school buildings will collapse after the quake.
C. Because destructive flooding caused by rockfall dams is likely to occur..
D. Because there was not enough medical care for the injured in the area.
62. What can we infer from this passage?
A. There was no prediction that such a large-scale quake might occur there.
B. Researchers had done little research in that area before the earthquake struck it.
C. The 5.12 earthquake was the most destructive in the world.
D. If more research had been done, the destruction could have been avoided.
63. Which one can be used as the best title for this passage?
A. The Great Disasters.
B. The Earthquake was very frightening.
C. The Causes of the earthquake.
D. An Extremely Unusual Earthquake.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


What causes traffic jams? Too many cars, right? No! Some Brits are now saying that traffic lights are to blame for much of the congestion(交通擁擠). They suggest that traffic lights be removed at busy roads. They believe people are a better judge of when it’s safe to go, not a traffic light programmed by an absent regulator.
A report from the Institute of Economic Affairs, a UK think tank(智囊團(tuán)), argues that abolishing traffic signals would decrease congestion, reduce exhaust emissions(廢氣排放)and improve safety.
The report said that removing lights should also prevent other bad behavior caused by signals, such as speeding up to catch a green light. It would also avoid the wasted time when drivers have to sit at a red light even if no one is using the green.
The idea may sound strange, but it’s not new. Seven cities and regions in Europe are experimenting with no-lights roads.
Drachten in the Netherlands has got rid of 16 of its traffic light crossings and changed the other two to roundabouts under a “shared space” scheme. At crossings, cyclists dutifully raise their arm when they want to make a turn, and drivers follow a first-arrived, first-through approach and communicate by hand signs, nods and waving.
The result? Typical journey time has been cut in half, and accidents and congestion have mostly disappeared.
There have been small collisions but no problem, said Hans Monderman, creator of the scheme. “We want small accidents, in order to prevent serious ones. It works well because it’s dangerous. The driver has to be responsible for his or her own risk.
“The many rules take away the ability to be considerate,” Monderman added. “We’re losing our responsibility for socially responsible behavior.”
So far, Drachten’s locals have called the experiment a success. “I am used to it now,” said Helena Spaanstra, 24. “You drive more slowly and carefully, but somehow you seem to get around town quicker.”
Tony Ooostward, 70, was equally enthusiastic. “I am a walker and now you are the boss at the crossroads, everyone waits for you. But at the same time walkers wait until there are a number of people wanting to cross at the same time.”
Owen Paterson, UK’s Shadow Transport Minister, visited Drachten. He said Britain should learn from the model. “The idea is to create space where there is mild anxiety among everyone so they all behave cautiously. No one drives fast along a busy street thinking that they have right of way.”
60.Which of the following is the best title for the passage?
A. Don’t Count On Traffic Lights              B. New Traffic Systems Needed
C. Turn Those Traffic Lights Off         D. Let People Have More Say In Traffic
61.According to the report from the Institute of Economic Affairs, abolishing traffic lights would NOT lead to ____.
A. more time being saved                   B. reduction of traffic jams
C. improvement of the environment    D. right of way being taken for granted
62.The underlined word “collision” in Paragraph 7 means closest to ____.
A. jam     B. accident     C. trouble     D. congestion
63.From the passage we can see that the experiment in Drachten worked well because ____.
A. walkers have become the boss of the crossroads
B. cyclists, walkers and drivers each have specially designed routes
C. everyone finds that they have to do their share in regulating traffic
D. drivers are more careful and wait for eyclists or walkers to pass first

查看答案和解析>>

科目:高中英語 來源:不詳 題型:完形填空


第一節(jié)完形填空(共10小題;每小題2分,滿分20分)
  閱讀下面短文,掌握其大意,然后從21~30各題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。
I have experienced many different types of teachers and from each of them. I have drawn out characteristics to form the __21__ teacher. The person has no age or sex requirements __22__ this person must be pleasant to look at. I don’t believe teachers have to be beautiful but they have to keep __23__ well groomed. I have had a teacher who didn’t keep herself well groomed; the other students and I found her __24__ quite distracting. I believe that a teacher should wear the clothes he or she likes, but not things that are shocking or totally __25__. I find that students spend more time __26__ than they do listening.
This person should know his or her __27__ in detail. He or she must also possess a certain __28__ for it to get the students enthusiastic. He or she must be able to make lessons __29__ and pick out little details that relate it to the students. A teacher who just relays facts __30__ to be boring . A student can pick out facts from a textbook; it is the teacher who is to tie the subject together in an interesting fashion.                      
21. A. real            B. beautiful         C. ideal              D. pleasant
22. A. but             B. because          C. since            D. although
23. A students          B. colleagues        C. principals       D. themselves
24. A. method        B. appearance          C. speech           D. manner
25. A. strange          B. new                     C. expensive      D. cheap
26. A. playing        B. writing          C. copying         D. staring
27. A. students        B. time                     C. subject          D. character
28. A. idea            B. attitude          C. love              D. question
29. A. serious          B. humorous          C. intensive       D. funny
30. A. tends          B. fails                     C. avoids          D. pretends

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

San Francisco, a leader in urban recycling, is preparing to turn dog waste into energy.
Norcal Waste System Inc., the city’s largest garbage company, plans to test collection carts(回收車)and collection bags in a city-center park which is popular with dog walkers.
A city study found that almost 4 percent of all the garbage picked up at San Francisco homes was from animal waste, Norcal Waste spokesman Robert Reid said. San Francisco has about 120,000 dogs.
“The city asked us to start a program to recycle dog waste in order to cut back adding more waste in landfills(廢渣埋填池) “,Reid said.
Dog waste will be poured into a methane digester(沼氣池),and the methane it gives off will be collected and burned to make electricity or to heat homes.
“Dogs and cats in the United States produce about 10 million tons of waste a year,” Will Brinton, an environmental scientist said.
“As much as we love them, our pets leave a lot of fertilizer behind them in yards and on the street but that can be a major source of contamination of groundwater,” Brinton said.
European cities such as Zurich, Frankfurt, Munich and Vienna are starting biology programs to turn waste into gas ,he said.
San Francisco runs a great program to recycle bottles, cars, paper and other rubbish and now two-thirds of its garbage needn’t be carried to landfills .The city’s goal is a 75 percent drop by 2010 and zero new waste in landfills by 2020.
小題1:San Francisco will plan to use dog waste for making __________.
A.fertilizerB.gasC.electricityD.methane
小題2:What does the underlined word “ contamination” mean?
A.IncreaseB.ReductionC.FlowD.Pollution
小題3:What can we infer from the passage?
A.San Francisco is short of electricity
B.San Francisco has done a lot of in rubbish recycling.
C.Fewer people will keep dogs as pets in San Francisco
D.There will be no rubbish by 2010 in San Francisco
小題4:The passage is mainly about_______.
A.San Francisco ‘s new policy for pet keepers
B.San Francisco ‘s new plan for recycling
C.how to keep a city clean
D.how to deal with rubbish

查看答案和解析>>

同步練習(xí)冊答案