题目内容
听力原文： There are over 6,000 million people in the world today, and the total is increasing at the rate of more than 89 million a year.
The population is growing more quickly in some parts of the world than others. The continents with the fastest growth rates are Latin America and Africa. Asia comes third but because its present population is so large it is there that by far the greatest number of people will be added before the end of the century.
The main reason for the population explosion is not so much a rise in birth rates as a fall in death rates as a result of improvements in public health services and medical care.
The sudden increase in the population of the developing countries has come at a difficult time. Even if their population had not grown so fast they would have been facing a desperate struggle to bring the standard of living of their people to the point at which there was enough food, housing, education, medical care and employment for everyone to have a reasonable life.
The most pressing problem created by the rapid increase in population is a shortage of food. Over the past two years the total amount of food has decreased, and of course the total amount of food per person has decreased even more sharply.
As more and more babies born in developing countries have been surviving infancy, there is a shortage of schools and teachers, hospitals and doctors. Farming land is becoming scarce, and there are too few jobs and unemployment leads to further poverty.
This talk covers each of the following topics EXCEPT ______
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SECTION A CONVERSATIONS
Directions: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
听力原文：W: Hey Steve, got any plans for tonight？
M: Hi, Jane. No, I don't think so. Why？ Got any suggestions？
W: In fact, I do. I just got two tickets to the opening of the exhibit of the reprints by Julia Margaret Cameron. I should have mentioned it earlier, but I was on the waiting list for these tickets and I wasn't sure I'd even get them.
M: An exhibit, huh？ I like such things. But I don't know who Julia...
W: Margaret Cameron! She was a photographer in the 1800s. She is interesting to art historians in general and students of photography in particular because she ... how should I say, changed the aesthetics for photography.
M: What do you mean？
W: Well, her specialty was portraits and instead of just making a factual record of details like most photographers did, you know, just capturing what a person looks like in a dispassionate sort of way, she, like a portrait painter, was interested in capturing her subject's personality. M. Interesting! How did she do that？
W: She invented a number of techniques that affect the picture. One of those things she did was to blur images slightly by using a soft focus on the subject. That's pretty common now.
M: Yeah, seems so. Who did she photograph？
W: Famous. people of her day: Alfred Lord Tennyson, Henry Wadsworth Longfellow, Charles Darwin; I don't know who else. We'll see at the exhibition.
M: You really pick my curiosity. I am going to enjoy this.
What is the conversation mainly about？
负责确定焊缝检测部位，评定焊接质量，签发检查文件，参与焊接技术措施审定的焊接人员是()。
W: What do you need to know？ I think it's a really great system.
M: First of all, where does it go？
W: The university shuttle bus goes all over campus. It does not leave the campus; if you want to travel off-campus, you'll need to take the city bus. But the university shuttle bus will get you from one class to the next, very efficiently.
M: And how much does it cost？
W: It's free, can you believe it？ So you don't have to pay a cent to get all around the university campus.
M: That's really great. And how do I catch the shuttle bus？
W: Just look for one of the bright yellow shuttle bus signs, and go stand next to it. You can see the shuttle bus signs all over campus. A shuttle bus will come along approximately every five minutes, so you shouldn't have to wait long.
M: That all sounds good. Thanks for your help.
W: No problem.
What are the man and woman discussing？
听力原文： U.S. first lady left for Cairo on Saturday for a 12-day visit aimed at improving the often mistrustful relationships between the Islamic world and the United States. The first lady will also get a break from daily speculation at home about her political future during the trip that will take her to Egypt, Tunisia and Morocco. The plane carrying the first lady experienced a minor problem as it taxied down the runway at Andrews Air Force Base. The Boeing 707 returned to the terminal where it was checked by Air Force mechanics and cleared for takeoff.
What was the purpose of U.S. first lady's visit？
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