题目内容
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： The helicopter can fly forwards, backwards, up, down, and sideways. It can also hover in the air. It needs no runway to operate from. It can land and take off from a flat roof-or a clearing in the jungle.
The main disadvantage of the helicopter is that it cannot fly as fast as most planes. It is also often noisy. Helicopters are widely used by the armed forces. They are also useful for sea and mountain rescue operations. In some cities they are used for regular passenger flights.
The helicopter is different from an aeroplane which gets its lift from fixed wings, and its thrust from a propeller or a jet. Instead of wings, the helicopter has a many-bladed rotor on its top. This is driven by the engine. The rotor blades are, however, the same shape as wings and they provide lift for the helicopter when they turn. The spinning rotor also propels the helicopter. The helicopter pilot maneuvers his craft by altering the angle of the rotor blades.
As the turning of the rotor tends to make the body of the helicopter turn as well, most helicopters have a small rotor on their tail.
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SECTION B INTERVIEW
Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds to answer each of the following five questions.
Now listen to the interview.
听力原文： This week in the magazine, in "Nerd Camp," Burkhard Bilger writes about a camp for gifted teenagers. Here Bilger and The New Yorker's Daniel Cappello discuss the social, educational, and recreational problems facing the very smartest students.
D: Your article is about the Center for Talented Youth, a summer program for gifted children--"nerd camp," as many participants called it--at Johns Hopkins University. What is nerd camp？
B: Nerd camp is a lot like any other summer camp, only the kids spend most of their time studying instead of playing, and they have to be really, really smart to get in. There are nerd camps all over the country these days--about fifteen thousand students attend them every year, and thousands more attend day programs--in part because so many schools have dismantled their gifted programs. Only about two cents of every hundred dollars spent by the federal government is earmarked for the gifted, so a lot of these kids have been stranded Most of them start the regular school year already knowing nearly half of the things they're going to be taught. So these camps are places where they can stretch their legs, intellectually--which is a pretty astonishing thing to see. It's not unusual for a student at one of these camps to cover a year of algebra in two weeks.
D: Do you think advancing or skipping grades a good idea？
B: Most schools practice grade acceleration in a fairly clumsy way. If a kid is bored in his class, and his parents complain enough, he might be allowed to move up a year. The problem is, if he's as bright as many of the kids at the Johns Hopkins camp, he'll soon be ready to move past those older kids as well. And, of course, being the smallest, brightest kid in a class has never been a recipe for popularity. When I talked to Camilla Benbow , the clean of education and human development at Vanderbilt University, she told me that schools simply use the wrong Criterion--age--to divide students up. Rather than lumping all the seven-year-olds in one group and all the eight-year-olds in another, they should group all students by ability--regardless of their age. "When they're ready to take Algebra I, let them take Algebra I,' she told me. "We don't buy shoes or piano books for children based on how old they are. Why is reading or math any different？"
D: At the nerd camps you visited, what was the social life like？ How do the kids deal with normal adolescent rites of passage？
B: I went to camps at Johns Hopkins and Vanderbilt, and both places were pretty lively. The kids went to movies and excursions and weekly dances, and the dorms were predictably noisy. Some psychologists have suggested that students who are intellectually gifted also tend to mature faster than average, but I didn't see much evidence of that. They had the same boy-girl problems, the same hormonal jitters. But there was a re- al giddiness in the campers--a sense of relief at finally getting to hang out with kids who were like them.
D: What about genius？ How do we separate high intelligence from real genius, and how rare is it？
B: It's hard to know exactly what qualities are the most predictive of genius. Intelligence is important, obvious- ly, but it's not nearly enough. In the nineteen--twenties, the Stanford psychologist Lewis Terman tried to find the most gifted kids in California by having teachers nominate candidates and then giving them the Stan ford--Binet I. Q. test, which Terman had helped develop. He ended up with more than fifteen hundred exceptionally bright kids--people called them the "Termites"--and spent the rest of his life tracking their careers
听力原文：M: It must have at least two bathrooms and a large kitchen.
W: And a two-car garage and a half-acre garden.
Q: What are the two speakers discussing？
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A．She can hear them crying very loudly at the zoo.B．She's heard them panting and was t
某项目有四种方案，各方案的投资额、现金流量及有关评价指标如下表所示。若已知基准收益率ic=16%，则经比选最优方案为()。
各方案投资及有关数据表
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