题目内容
Seventy-five to 90% of all adults suffer adverse health effects from stress.
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听力原文： Well, temperatures are finally staffing to fall in north America with pinches of snow already on the ground in some northern regions of the country. Even so the memory of this past summer's breaking heat and draught are still with most of people.
As our fears that the long predicted greenhouse effect of increased global temperatures and attendant problems may have actually begun. But of course one summer heat wave is not a trend make. Exports at NASA are compiling statistics of summers past and present in order to hatter document the changes, which may or may not be occurring. Some scientists hypothesize that warming trend does exist based on data gathered to variety of methods over the last 100 years.
NASA's chief scientist for global change promotes the study of this phenomenon on the international scale using satellite data and help from other countries to gain a worldwide perspective on the greenhouse effect.
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A．The couple could not stop by this evening.B．The couple are now living in a hotel.C．T
A．A doctor in Qatar.B．Nurse Maitland.C．Dr. Brown.D．Agatha Christie.
听力原文：M: Sue, how do you decide what time to show a program？
W: Well, it depends on the program. We look for different types of programs for different times of the day. For example, at breakfast time, we show short news and interview program. People don't watch for long in the morning, so everything must be very short.
M: And what happens later？
W: Well, we plan programs around what people are usually doing. We have to think about prime time.
M: Prime time--what's that, exactly？
W: Prime time is the time when the largest number of people is watching TV. In this country, that's from 6 p.m. to 11 p.m. Most people have come home from work and they're relaxed.
M: And, what programs do you show then？
W: We usually show new TV series which most people like. You see, before 9 p.m., we try to show programs for everybody.
M: Oh, I see.
W: And we also need to think about the ratings.
M: Can you tell us about that？
W: Well, the ratings tell us how many people are watching each program.
M: Oh, how do you know that？ You can't ask everybody!
W: No, of course not. Well, most TV stations buy information from an audience research company. They ask a small number of people -- perhaps a few hundred-- to keep a record of what they watch. Then that gives them an idea of what everybody watches.
M: Are ratings very important？
W: Very important. Our television company is commercial. We make money by selling advertising time. If our ratings are high, we can ask a higher price for advertising time. So we're always trying to increase our ratings.
M: So in a way, the advertisers Control what you show on television.
W: Um, not directly, but in a way, yes.
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