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下面是一篇杂志文章， 请将标有A—F的段落插入文章标号76-80的合适位置， 使这篇文章意义完整， 结构连贯；其中有一个段落是多余的。 The earth's population has already doubled three times during the past century. Even at that, the human presence, which is clearly-seen almost everywhere on the earth, has had a greater impact (冲击) than simply numbers alone would be a sign.(76)____. Use of that capacity has both advantages and disadvantages. On one hand, developments in technology have brought great benefits (益处) to almost all people. Most people today get close to goods and services that were once enjoyed only by the wealthy—in transportation, communication, nutrition, health care, entertainment, and so on. (77)_____. The growth of agricultural technology has made possible a very large population but has brought great shortage on the soil and water that are needed to continue great deal of production. Our use of vast stores of fossil fuels have made us dependent on a nonrenewable resource. In our present numbers, we will not be able to keep up our way of living on the energy that current technology provides, and alternative technologies may be unsuitable or may present unacceptable dangers. (78).____. Already, by-products of industrialization in the atmosphere may be using up the ozone (臭氧) layer, which protects the planet's surface from harmful ultraviolet rays, and may be creating a buildup of carbon dioxide, which traps heat and could raise the planet's average temperatures. (79)._____. It has interfered with their food sources; has changed their habitats by changing the temperature and chemical composition of large parts of the world environment; has destroyed their ecosystems by introducing foreign species, has reduced the number of living species; and changed the breeding (养殖 ) style of certain plants and animals by selective breeding and more recently by genetic engineering. (80).____. (A)From the standpoint of other species, the human presence has reduced the amount of the earth's surface available to them by clearing large areas of vegetation. (B).It is not only large technologies—nuclear reactors or agriculture—that tend to have side effects, but also the small, everyday ones. The effects of ordinary technologies may be individually small but collectively significant. (C).What the future holds for life on earth will be determined largely by the human species. The same intelligence that got us where we are—improving many ways for human beings to live on and introducing new dangers into the world—is also our main resource for survival. (D).Our vast mining and producing efforts produce our goods, but they also dangerously pollute our rivers and oceans, soil, and atmosphere. (E).We have developed the way to control over most plant and animal species—far more than any other species can—and the way to shape the future rather than merely respond to it. (F).On the other hand, the very behavior that made it possible for the human species to prosper so rapidly has put us and the earth's other living things at new kinds of risk. --------- Key (76).E (77).F (78).D (79).A (80).C |
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