文勇的新托福黄金&ccedil

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Unformatted text preview: 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. 13. Look at the four squares [█] that indicate where the following sentence can be added to the passage. This is the criterion emphasized by Darwin's theory of evolution by natural selection. Where would the sentence best fit? 14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth. ● ● ● Answer choices ○Scientists had believed for centuries that meteorite activity influenced evolution on Earth. ○An iridium­enriched sediment layer and a large impact crater in the Yucat provide evidence that a large meteorite struck Earth about 65 million years ago. ○The site of the large meteorite impact at the end of the Cretaceous period was identified in 1990. ○Large meteorite impacts, such as one at the end of the Cretaceous period, can seriously affect climate, ecological niches, plants, and animals. ○There have also been large meteorite impacts on the surface of the Moon, leaving craters like Tycho. ○Meteorite impacts can be advantageous for some species, which thrive, and disastrous for other species, which become extinct. 178 [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 在在在在在 ○4 2. ○3 3. ○3 4. ○2 5. ○1 6. ○3 7. ○3. 8. ○2 9. ○2 10. ○2 11. ○1 12. ○4 13. ○3 14. ○2, 4, 6 1. 179 [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 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在在在在在在在 6500 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在在在在在在在在在在在在在在在在在在在在在 在...
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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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