Microwaves may be great at warming up food, but what about warming people?
Using microwaves to directly heat owners of
a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this techniqu
e would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 kilowatts per square centimeter (mw. / sq. cm. ) ; a satisfactory feeling of warmth occurs between 35 and 50 mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.
In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
While it might be some time before homeowners are comfortable enough with the idea to set up whole-body microwave heaters in houses, Buffler says microwaves may attract livestock(家畜) farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly. Which of the following can tell the main idea of the passage?
| A．A new heating system. |
| B．A new microwave oven. |
| C．A popular technique. |
| D．The magnetron. |
According to Paragraph 2, which of the following does not describe the characteristics of a microwave heater?
| A．It directly heats people in a room. |
| B．It heats walls and furniture in a room. |
| C．It is safe. |
| D．It saves energy． |
The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ________________.
| A．20 mw. / sq. cm. | B．40 mw. / sq. cm. |
| C．60 mw. / sq. cm. | D．85 mw. / sq. cm. |
According to Paragraph 4, which of the following fills the room with low-power microwaves?
| A．The magnetron. |
| B．The motion detector. |
| C．The microwave oven. |
| D．The radiation-absorbing chemical. |
Which of the following statements about
microwave heaters would Buffler most probably agree with?
| A．Microwave heaters will soon be widely used by homeowners. |
| B．Microwave heaters sometimes make people feel uncomfortable. |
| C．Perhaps microwave heaters will be first used by livestock farmers, who wish to protect their lambs in winter. |
| D．Microwave heaters cannot be accepted by the public because they are somewhat unsafe. |
Researchers are finding new ways to save snakebite victims.Experts discussed the latest findings during a recent conference.
Scientists in Australia have shown that a chemical called nitric oxide could increase the chances of surviving a poisonous snakebite.The scientists injected rats with a deadly amount of snake venom.Then they rubbed an ointment(软膏)containing nitric oxide on the skin around the injection site.The study found that the rats lived about one-third longer than if nitric oxide had not been used.But the treatment had to be started very quickly.
Dirk van Helden led the research.He says the nitric oxide ointment also showed promise in humans.The study appeared earlier this year in the journal Nature Medicine.Scientists say the findings could help save many lives.A recent study found that poisonous snakes cause as many as ninety-four thousand deaths worldwide each year.But Ulrich Kuch of the Biodiversity and Climate Research Center in Frankfurt,Germany,says that number appears to be low.
Mr Kuch says many deaths could be prohibited if snakebite victims are treated correctly,but they often go to traditional healers or do not seek any help at all.He said,“Sometimes it’s because there is no treatment available—no antivenom(抗蛇毒血清),which is the specific(特殊的)drug to treat snakebites—or health care staff do not know how to treat snakebites,and sometimes its because transportation to get to a health facility is not available or too expensive.
Here is no single antivenom that can be used to treat all snakebites.The antivenom must be specific to the kind of snake that bit the person.In some countries the treatment is costly,while in others there is no such treatment.What is this passage mainly about?( )
| A．Snakebite deaths around the world. |
| B．Progress in fighting snakebite deaths. |
| C．Snakebite treatment around the world. |
| D．The chances of surviving a poisonous snakebite. |
After being rubbed an ointment containing nitric oxide,the rats .
| A．suffered no pain | B．died immediately |
| C．lived a little longer | D．started feeling uncomfortable |
What does Paragraph 3 suggest?( )
| A．The number of deaths caused by snakebites is becoming lower each year. |
| B．The nitric oxide ointment has saved thousands of people’s lives. |
| C．It is very important to find an effective way to treat snakebites. |
| D．The number of deaths caused by snakebites worldwide is low. |
What does the underlined word “prohibited” in Paragraph 4 mean?( )
| A．caused. | B．considered. |
| C．examined. | D．prevented. |
What is implied in the last paragraph?( )
| A．Antivenom can be made very easily. |
| B．It’s very important to use the correct antivenom to treat snakebite victims. |
| C．Antivenom is extremely expensive all over the world. |
| D．A person bitten by a snake will survive as long as there is antivenom. |
A painting by Chinese artist Qi Baishi set a record for modern art and calligraphy (书法) on the mainland when it sold for 425.5 million yuan at an auction (拍卖) on May 22. The sale was a milestone (里程碑) in the auction of modern and contemporary artworks.
The price meant its value had risen more than 2,000 per cent in six years. The work , Eagle standing on pine tree with four-character coupleti（对联）, measures about 2.6 metres by 1 metre . It was the second highest price paid for an artwork on the mainland . A Song dynasty work by Huang Tingjian was sold for 436.8 million yuan in 2010. Qi’s painting was finished in 1946 when Qi was 86, and was his largest work . With a starting price of 88 million yuan, it attracted nearly 50 bids（出价）in half an hour. Shanghai businessman Liu Yiqian said that the work had belonged to him and had cost less than 20 million yuan in 2005. The auction company said the work was brought back to the mainland after being bought from a private owner in San Francisco six years ago.
China ranked first in global art sales last year, ahead of the United States and Britain . Four Chinese artists were among the top 10 in worldwide sales: Qi Baishi , Zhang Daqian, Xu Beihong and Fu Baoshi. Qi’s works ranked second in sales to Pablo Picasso’s last year . Qi was born into a peasant family in Hunan in 1864. He taught himself to paint and focused on nature including plants, insects, birds and fish. He is mostly well-known for his paintings of shrimps. In 1953, he was elected president of the Association of Chinese Artists. He died in Beijing in 1957.What’s the best title of the text ?
| A．Qi Baishi’s Painting Was Discovered . |
| B．Qi Baishi’ s Painting Was Brought Back . |
| C．Qi Baishi’s Painting Sets an Auction Record . |
| D．The Value of Qi Baishi’s Paintings Is on the Increase . |
Whose artwork sold for the highest price on the mainland ?
| A．Qi Baishi’s . | B．Huang Tingjian’s |
| C．Xu Beihong’s . | D．Zhang Daqian’s . |
The auction price of Qi’s painting was _____ million yuan higher than the starting price in the auction .
| A．337.5 . | B．348.8 . | C．50 . | D．11.3 . |
Which of the following is TRUE ?
| A．Qi finished the painting when he was young . |
| B．The painting was once stolen by an American . |
| C．The owner of this painting Liu Yiqian gained a lot of money . |
| D．Pablo Picasso’s works ranked second in sales to Qi’s last year . |
The text is most probably taken from a _____.
| A．computer book | B．library guide |
| C．technology magazine | D．newspaper report |
Pablo Picasso was born in Spain in 1881. His father was an artist and also an art teacher. He gave little Picasso the first lesson in drawing. The boy showed great interest in it and learned it very quickly. Picasso drew so well that he won a prize – “Science and Charity” for his first important painting at the age 15. Later he studied in several cities in Spain. But no one could teach him because he had known so much.
When he was 19, he visited Paris. At that time, Paris was the center of the world for artists. Everything in the painting world was new to Picasso. When he was 23, he moved to Paris to live and spent the rest of his life in France.
In his 80s, Pablo Picasso still worked like a young man. He kept on looking for new ideas and new ways to work. He never stopped painting all his life.
Pablo Picasso died in 1973 as a great artist in the world. Pablo Picasso was born _____.
| A．in France in 1973 | B．in Spain in 1973 |
| C．in Spain in 1881 | D．in Paris in 1881 |
Pablo Picasso won the prize______.
| A．“Science and Art” at the age of 15 |
| B．“Science and Charity” at the age of 15 |
| C．“Science and Art” at the age of 19 |
| D．Science and Charity” at the age of 23 |
______was the center of the world for artists when Pablo Picasso was young
| A．Spain | B．New York |
| C．London | D．Paris |
Pablo Picasso was good at _________
| A．teacher | B．acting |
| C．painting | D．thinking |
What about Pablo Picasso when he was over 80 years old?________________
| A．He still worked and kept painting all his life |
| B．He gave lessons in drawing |
| C．He studied in several cities in Spain |
| D．He spent the rest of his life with his father |
One summer night Ludwig Beethoven took a walk in the suburb (市郊) of Bonn. Suddenly a gentle wind came. He heard some music. He listened carefully and found it was his F sonata. He followed the music and came to a small house. There through the window, he saw a girl playing a very old piano and a young man was making shoes beside her, he pushed the door open and went in. The host received him very warmly and told him that the girl was his sister, who was blind but very fond of music. They couldn’t afford to send her to a master. So she was only trying to play some music she heard the neighbors play. She knew it was the work of a great composer. Beethoven was very much moved. Suddenly the candle was blown out. Moonlight struck on the girl’s slender figure. Then Beethoven played music for them. He played so wonderful that the brother and sister were amazed. That was his famous Clair de lune. Beethoven heard the music because ______.
| A．it was played loudly | B．there was a slight wind |
| C．the piano was old | D．he stopped walking |
The young man and the girl were _____.
| A．brother and sister | B．husband and wife |
| C．lovers | D．good friends |
The girl couldn’t go to the teacher most probably because_____.
| A．she was blind |
| B．her brother didn’t want her to go |
| C．they were too poor |
| D．good friends |
Beethoven played some music____.
| A．before he was moved |
| B．as soon as he came in |
| C．when he saw the piano |
| D．after he heard the moving story |
Beethoven, a famous musician in the world, was born in Germany in 1770.
In his childhood Beethoven didn’t have a happy life．His father was a singer. When he was only four, his father began to make him practise hour after hour on different musical instruments(乐器). If he did not put his heart into it, his father would beat him or make it hard on him.
Beethoven loved music and he learned so fast that he was able to go around to give concerts, when he was only a boy of eleven. At the age of seventeen, he won high praise from Mozart, the great musician at that time.
Beethoven was often poor and ill during his life. After one illness, he suddenly found himself deaf. At that time he was only thirty-one. It was a blow(打击)to him indeed.
But he still went on working and writing music pieces. To people’s surprise, some of his best pieces were written after he lost his hearing.
In 1827, leaving more than 300 pieces, the great musician died. But his name is still remembered to this day.Beethoven was a ______ musician.
| A．America | B．French |
| C．German | D．British |
What happened when he was thirty-one? ___________.
| A．He was blind | B．He was deaf |
| C．He gave concerts | D．He won high praise |
Why didn’t Beethoven have a happy life in his childhood? ___________.
| A．Because his family was poor |
| B．Because he had to practise a lot of musical instruments |
| C．Because his father was strict with him |
| D．Both B and C |
The great musician lived in the world for only ______ years.
| A．43 | B．70 | C．57 | D．60 |
When were some of his best pieces written? ____________.
| A．At the age of 11 | B．At the age of 17 |
| C．Before he was deaf | D．After he became deaf |
What did Beethoven do after he lost his hearing? ____________.
| A．He never gave in | B．He stopped writing music pieces |
| C．He lost his heart | D．He went to see a doctor |
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