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SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： The British Broadcasting Corporation is rejecting more and more candidates applying for jobs, because they suffer from hearing loss. And this is due to a wide use of personal stereo systems, According to officials at the corporation, about three per cent of them fail to win jobs for this reason. The figure indicates that people suffering from hearing defects are more common than a decade ago.
Candidates applying for jobs at the British Broadcasting Corporation have always had hearing tests, but the techniques for such tests were not standardized until five years ago. The 'corporation says officially that there is no proof to link personal stereos with hearing disabilities, but frequent exposure to high level of sounds can diminish a person's understanding of speech. That will rule out his chances of being an engineer taking care of sound quality in recording.
So experts are now calling for manufacturers of personal stereos to provide a warning light. It flashes when the sound is too loud. One British manufacturer accepted this suggestion. And this manufacturer has made a device that switches itself off when the level of sound is too high. This device is of great significance and the situation changes a lot ever since.
What is the possible mason for the candidates fail to get jobs at the BBC？
A．Because they are not qualified engineers.
B．Because they have had little exposure to high level of sounds.
C．Because their stereo systems are poor.
D．Because they suffer from hearing loss.
Passage Two
Questions 62 to 66 are based on the following passage.
You never see him, but they're with you every time you fly. They record where you are going,how fast you're traveling and whether everything on your airplane is functioning normally. Their ability to withstand almost any disaster makes them seem like something out of a comic book.They're known as the black box.
When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India ocean June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine (潜水艇) detected the device's homing signal five days later, the discovery marked a huge step toward determining the cause of a tragedy in which 152 passengers were killed.
In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U.S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the device was completely redesigned and moved to the rear of the plane – the area least subject to impact – from its original position in the landing wells (起落架舱). The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.
Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations,and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments. Placed in an insulated (隔绝的) case and surrounded by a quarter-inch-thick panels of stainless steel, the boxes can withstand massive force and temperatures up to 2,000℉. When submerged, they're also able to emit signals from depths of 20,000 ft. Experts believe the boxes from Air France Flight 447, which crashed near Brazil on June 1,2009, are in water nearly that deep, but statistics say they're still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years, only one plane's black boxes were never recovered.
注意：此部分试题请在答题卡2上作答。
62. What does the author say about the black box？
A) It is an indispensable device on an airplane.
B) Its ability to ward off disasters is incredible.
C) It ensures the normal functioning of an airplane.
D) The idea for its design comes from a comic book.
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： Today we're going to evaluate the main tool used when addressing groups the voice. There are three main elements that combine to create either a positive or negative experience for listeners. They can result in a voice that is pleasing to listen to and can be used effectively. Or they can create a voice that doesn't hold attention, or even worse, causes an adverse reaction.
The three elements are volume, pitch, and pace; When evaluating volume, keep in mind that a good speaker will adjust to the size of both the room and the audience. Of course, with an amplifying device like a microphone, the speaker can use a natural tone. But speakers should not be dependent on microphones—a good speaker can speak loudly without shouting.
The second element, pitch, is related to the highness or lowness of the sounds. High pitches are, for most people, more difficult to listen to, so in general speakers should use the lower registers of their voice. During a presentation, it's important to vary pitch to some extent in order to maintain interest.
Pace, that is how fast or slow words and sounds are articulated, should also be varied. A slower pace can be used to emphasize important points. Note that the time spent not speaking can be meaningful, too. Pauses ought to be used to signal transitions or create anticipation. Pauses can be very effective when moving from one topic to another.
What's the main point the speaker makes？
A．Content of speech is more important than tone of voices.
B．Voice quality has a strong effect on listeners.
C．Effective speakers must use visual aids.
D．Amplifying devices are essential in large rooms.
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： It was an Italian inventor who created the first wireless device for setting out radio signals in 1895. But not until the American inventor Lee De Forest built the first amplifying vacuum tube in 1906 did we get the first radio as we know it. And the first actual radio broadcast was made on Christmas Eve of 1906. That's when someone working from an experimental station in Brand Rock, Massachusetts, arranged the program with two short musical selections of poem and brief holiday greeting. The broadcast was heard by wireless operators on ships with a radio through several hundreds miles. The following year, De Forest began regular radio broadcasts in New York. These programs Were similar to much what we hear on radio today. In that, De Forest played only music. But because there were still no home radio receivers, De Forest's audiences consisted only of wireless operators on ships in New York Harbor. There is no doubt that radio broadcasting was quite a novelty in those days, but it took a while to catch on commercially. Why？ Hmm, for the simple fact that only a few people, in fact, only those who tinkered with wireless telegraphs as a hobby owned receivers. It wasn't until the 1920s that someone envisioned mass appeal for radio. This was radio pioneer David Sarnoff who predicted that one day there would be a radio receiver in every home.
Why were early radio broadcasts heard by such a small audience？
A．Few people owned the necessary equipment.
B．The music selection was not very popular.
C．Few ships came into New York harbor.
D．The radio signal was too weak to reach a mass audience.
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： We all scream for water when thirsty. (15[A]) But do you know in very hot, dry weather plants also make faint sounds— as if they're crying out for help？
You see, in a plant's stem there're hundreds of "water pipes" that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes harder and harder for the plants to do this.
In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises 10,000 times quieter than a whisper.
Robert knows that healthy, well-watered plants are quiet. (16[D]) He also knows that many insects prefer attacking dry plants rather than healthy plants. How do the insects know which are healthy plants and which are not？ Robert thinks that the insects may listen for the plants that cry. And then they may buzz in to kill.
To test his theory, Robert is using a device that can imitate plant cries. He attaches it to a quiet, healthy plant so the plant sounds thirsty. Then he watches insects lo see if they attack more often than usual.
If he is right, scientists could use the insects' ability against them. (17[D]) They could build traps that imitate crying plants. So when the insects buzz in to eat, they won't buzz out.
What do plants do when they are thirsty？
A．They give out faint cries.
B．They make noises to drive away insects.
C．They extend their water pipes.
D．They become elastic like rubber bands.
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： We all scream for water when thirsty. But do you know in very hot, dry weather plants also make faint sounds — as if they're crying out for help？
You see, in a plant's stem there're hundreds of "water pipes" that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes harder and harder for the plants to do this.
In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises 10,000 times quieter than a whisper.
Robert knows that healthy, well-watered plants are quiet. He also knows that many insects prefer attacking dry plants rather than healthy plants. How do the insects know which are healthy plants and which are not？ Robert thinks that the insects may listen for the plants that cry. And then they may buzz in to kill.
To test his theory, Robert is using a device that can imitate plant cries. He attaches it to a quiet, healthy plant so the plant sounds thirsty. Then he watches insects to see if they attack more often than usual.
If he is right, scientists could use the insects' ability against them. They could build traps that imitate crying plants. So when the insects buzz in to eat, they won't buzz out.
What do plants do when they are thirsty？
A．They give out faint cries.
B．They make noises to drive away insects.
C．They extend their water pipes.
D．They become elastic like rubber bands.
听力原文： Human beings enjoy challenges. Many of them like physical challenges. They ask themselves questions like these: How fast can I run ？ How high can I climb？ How deep can I dive？ How far can I swim？ How long can I hold my breath？ How much can I lift？ How high can I jump？ Because people enjoy challenges, they like to play sports and watch other people play sports. They like climbing, running, diving, lifting, jumping, and so on. Every four years millions of people all over the world enjoy the international sports competitions called the Olympics.
There are challenges that are not physical challenges. There are social and intellectual challenges, too. Leonardo Da Vinci, who lived in Italy during the fifteenth century, enjoyed every possible challenge. He was an artist and painted the well-known picture, the Mona Lisa. He was an inventor who invented a device to let people breathe under water. He was a scientist, and he learned a great deal about human anatomy.
Another kind of challenge faced the Egyptians between 4,000 and 5,000 years ago when they decided to build the first pyramid. They used six million tons of rock. That is enough to build a ten-foot wall around all of France. Four hundred thousand men worked for twenty years to build it.
So, for thousands of years, people accept challenges. Today we still have many challenges before us. Medical science faces the challenges of conquering the many diseases which still attack human beings. Engineers and planners must build new cities and new kinds of transportation. Scientists must develop new forms of energy. And many of us are interested in the challenge of space. We live in an age of challenge.
(30)
A．Intellectual challenge.
B．Social challenge.
C．Physical challenge.
D．Economic challenge.
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