题目内容
听力原文： Researchers say at least four patients have died after liposuction in New York and one in another U.S. city, raising questions about the safety of the nation's most popular type of cosmetic surgery. Until now, there have been occasional news stories of patients dying after liposuction, in which unwanted body fat is vacuumed out. But a report in yesterday's issue of the New England Journal of Medicine is the first detailed account in a medical journal. Doctors reviewing six years of autopsy records in New York City found four patients who had died after liposuction.
At least how many people have died after liposuction？
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听力原文：Allen: Excuse me. Could you help me？ I'd like to exchange this sweater.
Clerk: What is the problem with it？
Allen: It was a birthday present, but I don't really like it. I think I want something plainer.
Clerk: I see... Well, Why don't you look around.
Allen: This one looks nice. I want to try it on. I kind of like the black one.
Clerk: I think the red one is longer and a little looser so it will be more comfortable.
Allen: True, and it feels softer.
Clerk: And that color looks better on you. Actually, it is better quality and it is the same price as the sweater you are exchanging.
Allen: You have talked me into it! I will take this one instead.
Clerk: No problem, I will switch them for you.
Where did the customer get the sweater？
听力原文：Ken: Hey, John, that new Honda you have got is just beautiful.
John: Yeah, it is a nice car, isn't it？ Yours is a lot fancier though. I really like those electric windows.
Ken: Yeah, but our cars have something in common. Uh, they're both blue.
John: That is right. But they don't have much else in common.
Ken: How many miles to the gallon do you get？
John: Oh, I get about forty in town, a little more on the highway.
Ken: Oh, really？ I don't get anywhere near that. I only get about twenty.
John: But you got a lot more power-you can really accelerate.
Ken: As far as I am concerned, the only reason I have a lot of power in my car is I can haul my trailer.
John: Well, of course, you got a lot more room in the trunk than I have, too.
Ken: Mm. Yeah, but small cars are cheaper to run in the city.
John: That is true. A Honda is a lot better for me because I do a lot of city driving.
Ken: And small cars are easier to find parking space for.
John: Yeah, but neither one is all that cheap to run when you think about the cost of insurance and maintenance
Ken: You know what, John？ I think I have an answer.
John: What's that？
Ken: Let's take the bus.
John and Ken's cars don't have much in common EXCEPT _______.
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, air travel is far safer than driving a car on a busy motorway. Bur there is the danger that grows every year. From the moment the airplane takes off to the moment it lands, every moment is watched on radar screens. Air traffic controllers tell the pilot exactly when to turn, when to climb and when to come down. The air traffic controllers around the busy airport' may handle 1,000 planes a day. Any plane that flies near the airport comes under the orders of the controllers there. Even a small mistake on their part could cause a disaster. Recently, such a disaster almost happened. Two large jets were flying towards the airport. One was carrying 69 passengers and had come from Toronto; the other was carrying 176 passengers from Chicago. An air traffic controller noticed on his radar screen that the two planes were too close to each other. He ordered one to turn to the right to climb, but he made a mistake. He ordered the wrong plane to do this. So, instead of turning away from the second plane, the first plane turned towards it. 15 seconds later, it flew directly in front of the second plane. They avoided each other by the smallest part of a second. The distance between them was less than that of a large swimming pool. This is an example of the danger that grows every year.
What is the growing danger in air travel according to this passage？
证券组合管理就是力争将期望收益率最大的一组证券组合在一起，以实现投资组合的最优化。()
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