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 |
Open Letter to an Editor
I had an interesting conversation with a reporter recently--
-one who works for you. In fact, he's one of your best reporters. He wants to leave.
Your reporter gave me a copy of his resume (简历) and photocopies of six stories that he wrote for you. The headlines showed you played them proudly. With great enthusiasm, he talked about how he finds issues (问题), approaches them, and writes about them, which tells me he is one of your best. I'm sure you would hate to lose him. Surprisingly, your reporter is not unhappy. In fact, he told me he really likes his job. He has a great assignment (分工), and said you run a great paper. It would be easy for you to keep him, he said. He knows that the paper values him. He appreciates the responsibility you've given him, takes ownership of his profession, and enjoys his freedom.
So why is he looking for a way out?
He talked to me because he wants his editors to demand so much more of him. He wants to be pushed, challenged, coached to new heights.
The reporter believes that good stories spring from good questions, but his editors usually ask how long the story will be, when it will be in, where it can play, and what the budget is.
He longs for conversations with an editor who will help him turn his good ideas into great ones. He wants someone to get excited about what he's doing and to help him turn his story idea upside down and inside out, exploring the best ways to report it. He wants to be more valuable for your paper. That's what you want for him, too, isn't it?
So your reporter has set me thinking.
Our best hope in keeping our best reporters, copy editors, photographers, artists---everyone--is to work harder to make sure they get the help they are demanding to reach their potential. If we can't do it, they'll find someone who can.
| 1． |
What does the writer think of the reporter?
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| 2． |
What does the reporter want most from his editors in their talks?
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| 3． |
Who probably wrote the letter?
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| 4． |
The letter aims to remind editors that they should
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阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
Goldie's Se
cret
She turned up at the doorstep of my house in Cornwall. No way could I have sent her away. No way, not me anyway. Maybe someone had kicked her out of their car the night before. "We're moving house.'; "No space for her any more with the baby coming." "We never really wanted her, but what could we have done? She was a present." People find all sorts of excuses for abandoning an animal. And she was one of the most beautiful dogs I had ever seen.
I called her Goldie. If I had known what was going to happen I would have given
her a more creative name. She was so unsettled during those first few days. She hardly ate anything and had such an air of sadness about her. There was nothing I could do to make her happy, it seemed. Heaven knows what had happened to her at her previous owner's. But eventually at the end of the first week she calmed down. Always by my side, whether we were out on one of our long walks or sitting by the fire.
That's why it was such a shock when she pulled away from me one day when we were out for a walk. We were a long way from home, when she started barking and getting very restless. Eventually I couldn't hold her any longer and she raced off down the road towards a farmhouse in the distance as fast as she could.
By the time I reached the farm I was very tired and upset with Goldie. But when I saw her licking (舔) the four puppies (幼犬) I started to feel sympathy towards them. "We didn't know what had happened to her," said the woman at the door. "I took her for a walk one day, soon after the puppies were born, and she just disappeared." "She must have tried to come back to them and got lost," added a boy from behind her. '
I must admit I do miss Goldie, but I've got Nugget now, and she looks just like her mother. And I've learnt a good lesson: not to judge people.
| 1． |
How did the author feel about Goldie when Goldie came to the house?
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| 2． |
In her first few days at the
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| 3． |
Goldie rushed off to a farmhouse one day because she.
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| 4． |
The passage is organized in order of.
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The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage（短缺）seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.
Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.
This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation（灌溉）. In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.
Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.
1. From the first two paragraphs we learnt that _______.
A.much of the world’s water is available for use
B.people in high rainfll countries feel lucky
C.the costs of water redistribution should be considered
D.water can be easily carried through pipes across the world
2.Which of the following is true?
A.The water in Texas have been reduced by 75%.
B.Most industries in the world suffer from water shortagers.
C.The underground water in Saudi Arabia might run out in 50 years.
D.Good management of water use resulted from the project in the Central Valley.
3.What is most likely to be discussed in the paragreh that follows?
A.Steps to improving water use managet.
B.Ways tor redjuce the costs of builing dams.
C.Measured to dmal with worldwide water shortages.
D.Appmihes to handling the pressure on water supply.
4.The text is mainly about____________.
A.water supply and increasing population
B.water use management and agriculture
C.water redistribution and wildlife protection
D.water shornages and environmental protection.
My father was 44 and knew he wasn't going to male it to 45. He wrote me a letter and hoped that something in it would help me for the rest of my life.
Since the day 1 was 12 and first read his letter, some of his words have lived in mybeart. One it aways times out. "Right now, you are pretending to be a time-killer. But I know that one hay, you will do something great that will set you among the very best." Knowing that my dad believed in me gave me permission to believe in myself. "You will do something great." He didn't know what that would be, and neither did I, but at times in my life when I've felt proud of myself, I remember his words and wish he were here so I could ask. "Is this what you were talking about, Dad? Should I keep going?"
A long way frim 12 now, I realize hew would have been proud when I made any progress. Lately, thongn. I've come to believe he'd want me to move on to winat com next: to be nrood of and believe in, somebody else. It's time to start writing my own letters to my children. Our children look to us with the same unanswered question we had. Our kids don't hold back because they're afraid to fail. They're only afraid of failing us. They don't worry about being disappointed. Their fear－as mine was until my father's letter－is of being a disappointment.
Give your chikdren permission to succeed. They're witing for you to believe in them. I always knew way parents loved me. But trust my That elic will be more comlece, that love will be more real, and their belief in the nelces whi be greater if you write the words on their hearts; "Don't worry; you'll do something great." Not having that blessing from their parents may be the only thing holding them back.
| 1． |
We learn from the text that the author.
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| 2． |
What does the author tell us in the 3rd passgiaph?
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| 3． |
Which of the following is true of the author?
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| 4． |
The main purpose of the text is to.
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Have you ever wondered?
1.Why do airplanes take longer to fly west than east?
It can take five hours to go west-east from New York(NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon know as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes movement a constams air speed thus go faster in the west-east direction when the air moving with the wind than in the opposite direction.
2 What would happen if the gravity on Earth was suddenly turned off?
Supposing we could magically turn off gravity. Would buildings and other structures float away? What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed moving at over a thousand miles per hour. If you turn something round your head on a string, it goes around in a circle until you let go of the strong go of the string. Things not attacked to the Earth would fly off in a straight line . People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things would fly off into space.
| 1． |
What information coa we get from the first passage?
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| 2． |
The word"shoot"underlined in the 2nd passage probably means"".
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| 3． |
It can be interred that without gravity.
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| 4． |
Where can wemost probably read this text?
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author's house, Goldie.