题目内容
For an increasing number of students at American universities, Old is suddenly in. The reason is obvious: the graying of America means jobs. Coupled with the aging of the baby-boom (生育高峰) generation, a longer life span means that the nation's elderly population is bound to expand significantly over the next 40 years. By 2040, 25 percent of all Americans will be older than 65, up from 14 percent in 1995. The change poses profound questions for government and society, of course. But it also creates career opportunities in medicine and health professions, and in law and business as well. "In addition to the doctors, we're going to need more sociologists, biologists, urban planners and specialized lawyers," says Professor Edward Schneider of the University of Southern California's (USC) School of Gerontology (老年学).
Lawyers can specialize in "elder law", which covers everything from masts and estates to nursing-home abuse and age discrimination (歧视). Businessmen see huge opportunities in the elder market because the baby boomers, 74 million strong, are likely to be the wealthiest group of retirees in human history. "Any student who combines an expert knowledge in gerontology with, say, an MBA or law degree, will have a license to print money," one professor says.
Margarite Santos is a 21-year-old senior at USC. She began college as a biology major but found she was "really bored with bacteria." So she took a class in gerontology and discovered that she liked it. She says, "I did volunteer work in retirement homes and it was very satisfying."
"…Old is suddenly in"(Line 1, Para.1) most probably means______.
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听力原文： Students want to find the best way to put information into their long-term memories. They want to keep the information later when they take a test. What is the best way to learn information so they can remember it when they want to？
When studying, you should read the whole lesson first. This gives you the whole picture in which to put the ideas. New information that fits into the whole picture is easier to remember than separate facts, You also learn faster if you look at headings, introductions, important words, summaries, conclusions, and anything else that helps to organize the material, which is easier to understand.
Then the second step is to study the parts. Think about how they fit into the whole picture.
If you have a lot to study, don't try to do the whole job at once. Learning should be spread out and spaced. This gives the information time to "sink in." You should study grammar three times, a half hour each time. That is better than studying for an hour and a half at one time. Even shorter study periods are better for vocabulary lists and other difficult material. To learn the most in a two-hour study session, study different kinds of material; a half hour on grammar, 15 minutes on vocabulary, 20 minutes on writing, and so on. The change will help to keep you interested.
You forget most quickly right after you read or hear something new. You should review right away so you won't forget, and if possible, explain it to someone else. When you review and test yourself on the material, you are being active; active learning is better than just reading or listening.
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In the United States, the need to protect plant and animal species has become a highly controversial and sharply political issue since the passage of the Endangered Species Act in 1973. The act, designed to protect species' living areas, and policies that preserve land and forests compete with economic interests. In the 1990's, for example, the woodcutters in the Western United States were challenged legally in their attempt to cut trees for timber in the Cascade Mountains, The challenge was mounted to protect the endangered spotted owl (猫头鹰), whose remaining population occupies these forests and requires the intact, ancient forest for survival. The problematic situation set the interests of environmentalists against those of corporations and of individuals who stood to lose jobs. After months of debate and legal battles, the fate of the woodcutters and the owls was still undecided in mid- 1992.
Similar tensions exist between the developed and the developing nations. Many people in industrialized nations, for example, believe that developing nations in tropical regions should do more to protect their rain forests and other natural areas. But the developing countries may be impoverished (使穷困), with populations growing so rapidly that using the land is a means to temporarily avoid worsening poverty and starvation.
Many of the changes to Earth that concern scientists have the potential to rob the planet of its biological richness. The destruction of Earth's ozone layer (臭氧层), for example, could contribute to the general process of impoverishment by allowing ultraviolet rays to harm plants and animals. And global warming could wipe out species unable to quickly adapt to control human population, stabilize the composition of the atmosphere, and preserve intact Earth's complex web of life.
Why does the author say that the protection of endangered species is a highly controversial issue？
A．She isn't there in the morning.B．Her assistant isn't there in the morning.C．She won'
Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, television stations always operate at the highest sound level allowed for reasons of efficiency. According to one NBC executive, no difference exists in the peak sound level of ads programming. Given this information, why do commercials sound so loud？
The sensation of sound involves a variety of factors in addition to its speak level. Advertisers are skillful at creating the impression of loudness through their expert use of such factors. One major contributor to the perceived loudness of commercials is that much less variation in sound level occurs during a commercial. In regular programming the intensity of sound varies over a large range. However, sound levels in commercials tend to stay at or near peak levels.
Other "tricks of the trade" are also used. Because low-frequency sounds can mask higher frequency sounds, advertisers filter out any noises that any drown out the primary message. In addition, the human voice has more auditory (听觉的) impact in the middle frequency ranges. Advertisers electronically vary voice sounds so that they stay within such a frequency band. Another approach is to write the script. so that lots of consonants (辅音) are used, because people are more aware of consonants than vowel (元音) sounds. Finally, advertisers try to begin commercials with sounds that are highly different from those of the programming within which the commercial is buried. Because people become adapted to the type of sounds coming from programming, a dramatic change in sound quality draws viewer attention. For example, notice how many commercials begin with a cheerful song of some type.
The attention-getting property of commercial can be seen by observing one-to-two-year-old children who happen to be playing around a television set. They may totally ignore the programming. However, when a commercial comes on, their attention is immediately drawn to it because of its dramatic sound quality.
According to the passage, the maximum intensity of sound coming from commercials______.
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