文勇的新托福黄金&ccedil

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Unformatted text preview: of life all over the planet. According to some estimates, the majority of all extinctions of species may be due to such impacts. Such a perspective fundamentally changes our view of biological evolution. The standard criterion for the survival of a species is its success in competing with other species and adapting to slowly changing environments. Yet an equally important criterion is the ability of a species to survive random global ecological catastrophes due to impacts. 9. The word perspective in the passage is closest in the meaning to ○Sense of values ○Point of view ○Calculation ○Complication 10. Paragraph 6 supports which of the following statements about the factors that are essential for the survival of a species? ○The most important factor for the survival of a species is its ability to compete and adapt to gradual changes in its environment. ○The ability of a species to compete and adapt to a gradually changing environment is not the only ability that is essential for survival. ○Since most extinctions of species are due to major meteorite impacts, the ability to survive such impacts is the most important factor for the survival of a species. ○The factors that are most important for the survival of a species vary significantly from one species to another. Paragraph 7: Earth is a target in a cosmic shooting gallery, subject to random violent events that were unsuspected a few decades ago. In 1991 the United States Congress asked NASA to investigate the hazard posed today by large impacts on Earth. The group conducting the study concluded from a detailed analysis that impacts from meteorites can indeed be hazardous. Although there is always some risk that a large impact could occur, careful study shows that this risk is quite small. 11. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. ○Until recently, nobody realized that Earth is exposed to unpredictable violent impacts from space. ○In the last few decades, the risk of a random violent impact from space has increased. ○Since most violent events on Earth occur randomly, nobody can predict when or where they will happen. ○A few decades ago, Earth became the target of random violent events originating in outer space. 12. According to the passage, who conducted investigations about the current dangers posed by large meteorite impacts on Earth? ○Paleontologists ○Geologists ○The United States Congress ○NASA Paragraph 6: Impacts by meteorites represent one mechanism that could cause global catastrophes and seriously 177 [email protected] 在在在在在在 www.liuwenyong.com 在在在在在在在在在在在在在在在,在在在在在在在在在在 influence the evolution of life all over the planet. █According to some estimates, the majority of all extinctions of species may be due to such impacts. █Such a perspective fundamentally changes our view of biological evolution. █...
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This note was uploaded on 09/17/2013 for the course LANGUAGE 13DL208 taught by Professor Wang during the Fall '13 term at East China Normal University.

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