The biggest danger facing airlines nowadays may not be a terrorist with a gun, but the man with portable computer in business class. In the last 16 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference (电磁干扰). The source of this interference remains not proved, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, radio and cassette players and mobile telephones.
RTC.A. an organization which advises the aviation (航空 )industry, has suggested that all airlines ban such devices from being used during "critical" stages of flight particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently , rules on using these devices are left up to individual airlines. And although some air- lines prevent passengers from using such equipment during take-off and landing, most are unwilling to carry out a total ban, given that many passengers want to work during flight.
The difficulty is predicting how electromagnetic fields might affect an aircraft's computers. Experts know that portable devices send out radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not.
The fact that aircraft may be fragile to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment. As worrying，though, is the passenger who can 't hear the instructions to turn off his radio because the music's too loud.What is said about the over 100 aircraft incidents in the past 16 years?
| A．They may have been caused by the damage to the radio systems. |
| B．They may have taken place during take-off and landing. |
| C．They were proved to have been caused by the passengers’ portable computers. |
| D．They were suspected to have resulted from electromagnetic interference. |
Why is it difficult to predict the possible effects of electromagnetic fields on an airplane 's computers?
| A．Because it is extremely dangerous to conduct such research on an airplane. |
| B．Because it remains a mystery what wavelengths are liable to be interfered with. |
| C．Because research scientists have not been able to produce the same effects in labs. |
| D．Because experts lack adequate equipment to do such research. |
Few airlines want to perform a total ban on their passengers using electronic devices because_______
| A．they don't believe there is such a danger as radio interference |
| B．the harmful effect of electromagnetic interference is yet to be proved |
| C．most passengers refused to take a plane , which bans the use of radio and cassette players |
| D．they have other effective safety measures to fall back on |
The passage is mainly about_________.
| A．a new rule for all airlines |
| B．the disadvantages of electronic devices |
| C．a possible cause of aircraft incidents |
| D．effective safety measures for air flight |
BEIJING—Apple Inc is one step closer to beginning sales of iPad2 tablet computers with cellular network compatibility （兼容） for the first time in the Chinese mainland, where the consumer-electronics giant is in the midst of an aggressive expansion．
According to China’s Telecommunication Equipment Certification Center, a device by Apple with third-generation high-speed wireless data capabilities was issued the network access license needed for the company to begin official sales in China．The device, listed under model number “A1396”, is compatible with the 3G standard WCDMA, and would work with the cellular network operated by Apple’s local iPhone partner, China Unicom （Hong Kong） Ltd．
China Unicom declined to comment．
Apple already offers the 3G iPad2 in Hong Kong through its partners, but currently only offers Wi-Fi versions of the device in the Chinese mainland．Still, consumers in China, which according to research firm IDC surpassed the US as the world’s largest PC market in the second quarter, have been purchasing 3G tablets through unofficial channels．
Separately, Apple spokeswoman Carolyn Wu said on Sept 6 that the company’s first Hong Kong store, set to open this quarter, will be located in the city’s central shopping and business district in the International Finance Center’s upscale （高档的） IFC mall, a commercial center and sightseeing spot along the city’s waterfront．Wu also said that Apple is planning a new store in Shanghai later this quarter, which will be its biggest store in China．She declined to give more details or to comment on the 3G iPad2．
Apple currently has four full-service Apple stores in the mainland, which receive the most traffic of any Apple stores in the world．The company otherwise relies on resellers to get its products into the market．
The new stores reflect Apple’s confidence in rising demand for its products such as smart phones and tablet computers．Sales in the Chinese mainland, Hong Kong and Taiwan helped boost （增长） the company’s third-quarter results, newly appointed Chief Executive Tim Cook said in July．China revenue （收益） surged （激增） six-fold to about $3．8 billion during the three months ended June 25．
“This has been a substantial （重大） opportunity for Apple and I firmly believe that we’re just scratching the surface right now,” Cook said at the time, referring to strong sales in China．“I see an incredible opportunity for Apple there．”
From China Daily 2011-09-08According to the news, which of the following statements is true?
| A．WCDMA is not the only 3G standard in the world． |
| B．Apple Inc sells its products in the market of the Chinese mainland all by its own stores． |
| C．The consumers in China can only get iPad2 of Wi-Fi versions． |
| D．Chinese mainland is the second largest PC market in this year’s second quarter． |
Which one of the following phrases can replace the underlined word in paragraph 1?
| A．in the interests of | B．in the front of |
| C．in the process of | D．in the case of |
How many full-service Apple stores are there in China?
A．4． B6． C．8． D．Unknown．By saying “we’re just scratching the surface right now”, Cook means ________．
| A．they don’t know much about China’s market |
| B．they will sell more products and gain more profit in China |
| C．they need to obtain more permission from China’s government |
| D．they ignored the rural market in China |
Mark began to introduce the guest speaker to the listeners, but then stopped for a while. He had forgotten her name.
Barbara hid her valuable things when she went on vacation. When she came back, she couldn’t remember where she’d put them.
Perhaps you’ve had such experiences like these. Most people have. But most of them haven’t realized that they have a memory problem. Neither do they know a simple but important fact: Memory can be improved. If you’ll just accept that, the following will show you how.
First, relax. If you are over worried about something, you’ll forget it. If you keep telling yourself that your memory is bad, your mind will come to believe it and you won’t remember things. When you forget something, don’t follow up with saying like “Oh, my god! I always forget things!” Such words will have a bad result on you and your memory.
But relaxing isn’t enough. To improve your memory, you’ll need to take an active role. Like your body, your memory can be made strong through exercise. Look for opportunities to exercise your memory. For example, if you’re learning a language, try to actively remember a lot of new words.
If you don’t take notice of things actively, you won’t remember them. So, you can make pictures of what you see in your mind every day. For example, don’t just put your keys down! If you want to find them again, make a mind picture of the place where you’re putting them. The first two paragraphs just tell us.
| A．Barbara was a very rich person． |
| B．examples of memory problems |
| C．Mark often forgot his friends’ names |
| D．language problems of two persons |
When you forget things, you _______.
| A．must be too careless |
| B．shouldn’t take notice of the result |
| C．must accept the fact |
| D．shouldn’t lose heart about your memory |
The word “opportunities” in the fifth paragraph means “_______.”
| A．places | B．doctors. |
| C．chances | D．positions |
According to the passage, _____ can make your memory better.
| A．realizing your memory problems |
| B．talking to your friends |
| C．doing sports every day |
| D．making mind pictures of what you see |
The purpose of the passage is to help you ______.
| A．to introduce the guest | B．to improve your memory |
| C．to remember new words | D．to forget unhappy things |
A new study warns that about thirty percent of the world's people may not have enough water by the year 2025.
A private American organization called Population Action International did the new study. It says more than three-hundred-thirty-five-million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.
P-A-I researcher Robert Engelman says by the year 2025, about three-thousand-million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on Earth stays the same.
Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.
The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking waters not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera, which are carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.
The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.
The report also says long-term solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.are expected to have severe water problems by the year 2025.
| A．46 countries | B．18 countries |
| C．28 countries | D．No countries |
All the following are true except .
| A．Lack of water may cause conflict between countries |
| B．New industries need a lot of water |
| C．There are solutions to the water problem |
| D．Egypt now has enough fresh water |
It can be inferred that .
| A．There is connection between providing clean water and slowing population growth |
| B．Lack of water may also result from international conflict |
| C．The ability of developing has nothing to do with lack of water |
| D．It is not known whether diseases have something to do with lack of water |
The best title of the passage would be .
| A．World Conflict | B．World Water Shortage |
| C．Diseases and Water | D．Population and Water |
If you’re a foreigner looking for a place that has everything, there’s only one place to visit, and that’s New York. It’s a whole world in a city.
The World of Theater
All of New York is a stage, and it begins with Broadway. Where else can you find so many shows in one place? Only in New York !
The World of Music
Spend an evening with Beethoven at Lincoln Center. Swing to the great jazz of Greenwich Village. Or rock yourself silly at the hottest dance spots found anywhere.
The World of Art
From Rembrandt to Picasso. From Egyptian tombs to Indian teepees. Whatever kind of art you like, you will find it in New York.
The World of Fine Dining
Whether it is roast Beijing Duck in Chinatown, Lasagna in Little Italy, or the finest French coq au vin(chicken cooked in wine) found anywhere, there is a world of great taste waiting for you in New York.
The World of Sights
What other city has a Statue of Liberty? A Rockefeller Center? Or a Bronx Zoo? Where else can you take a horse-drawn carriage through the Central Park? Only in New York!What do you think the underlined word Rembrandt was / is?
| A．A musician. | B．A place in the World of Art |
| C．A place in New York. | D．An artist. |
Which of the following programs can a visitor have only in New York?
| A．To spend an evening with Beethoven. |
| B．To see the Statue of Liberty. |
| C．To taste the finest French coq au vin. |
| D．To enjoy the Beijing roast duck. |
The purpose of writing this text is to ___________ .
| A．help the readers get a better understanding of New York |
| B．supply the readers with some information about New York jobs |
| C．try to persuade the readers to visit New York |
| D．tell the readers where New York lies |
There was once a professor of medicine, who was very strict with the students. Whenever he took the chair on the exam committee(担任考试委员会主席), the students would be in fear, because he was seldom pleased with the answers they gave. A student would be lucky enough if he or she could receive a good mark from him. At the end of the term, the students of medicine would take their exam again. Now a student entered the exam room and got seated before the committee. This student was a little nervous as he knew it would not be so easy to get through the exam at all.
The professor began to ask. The student was required to describe a certain illness, his description of which turned out to be OK.
Then the professor asked about the cure (药剂) for illness, and the student, too, answered just as right.
“Good,” said the professor, “and how much will you give the patient?”
“A full spoon”, answered the student.
“Now you may go out and wait for what you can get.” said the professor. At the same time, the committee discussed carefully the answers the student had given. Suddenly the student noticed that there was something wrong with his last answer. “A full spoon is too much,” he thought to himself. Anxiously he opened the door of the room and cried, “Mr Professor, I’ve made a mistake! A full spoon is too much for a patient. He can take only five drops.”
“I’m sorry, sir.” said the professor coldly, “But it’s too late. Your patient has died.”The students were afraid of the professor because_________.
| A．they often angered and disappointed him |
| B．he often misunderstood them and give them bad markers |
| C．their answers often astonished him |
| D．their answers seldom satisfied him |
Before he left the room the student was almost sure that ______.
| A．his last answer was satisfying |
| B．he had passed the exam, and the only thing was to wait for the mark |
| C．he had made a mistake |
| D．he had not done well in the exam |
Which of the following is Not true?
| A．The patient will be in danger if he’s taken as much as a full spoon. |
| B．The doctor will be in trouble if he’s given the patient a full spoon. |
| C．Since one spoon is less than five drops, the patient will be all right soon if he takes only one full spoon at a time. |
| D．If the patient wants to remain safe, he should take no more than five drops at a time. |