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| 作者：不明 来源：www.pccode.net 整理 发布时间：2007-1-23 10:37:07 发布人：wongrs | |
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passage, to use chemicals and fertilizers means ______. A. to increase the amount of foods B. to increase the quality of foods C. to increase the amount and quality of foods D. to increase essential vitamins and minerals 61. It can be inferred from the passage that ______. A. people will no longer eat those foods containing chemical additives B. people will not necessarily do exercises in the future if they eat natural foods C. natural foods will find a good market in the future D. certain diseases will never befall people who eat natural foods 62. What’s the best title for this passage? A. Eating Habits Are Changing.B. Healthy Eating. C. Natural Food and Chemical Additives.D. How to Go on a Diet. Questions 63 to 65 are based on the following passage: Many stray dogs and cats wander the streets of cities. Usually they end up in animal shelters, where staffs must find ways to dispose of them. One legitimate disposal route has been the research laboratory. But in California, animal rights groups recently have been leaning hard on animal shelters, effectively cutting off much of the supply. About 30 years ago, Los Angeles voters soundly defeated a proposal to prohibit the release of animals for laboratory use. But today, with new proposals being submitted to city councils and county boards, the results could well be different. And the new proposals are much more sweeping. They would create review boards for all animal experimentation. A group of California investigators even have organized a committee for animal research in medicine. “Most scientists don’t realize the danger,” says Caltech neurobiologist John M. Allman, who uses monkeys to study the organization of the brain. “Such movements in the past—in this country, at least—have largely been the efforts of small, fragmented and relatively ineffective groups. But this new movement is carefully orchestrated, well organized, and well financed. It is easy to look at the history of animal experimentation and compile a catalog of horrors. But the day is long past when a researcher can take any animal and do anything he pleases to it with a total disregard for its welfare and comfort. People don’t realize,” says Allman, “that we are already extensively reviewed. In my work I must follow the ethical codes laid down by the National Institutes of Health and the American P
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