文勇的新托福黄金&ccedil

saltwerethinlayersofwhatappearedtobewindblownsilt

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: rections: 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 that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. For a long time scientists have argued that the extinction of the dinosaurs was related to climate change. ● ● ● Answer choices ○A simple climate change does not explain some important data related to the extinction of the dinosaurs at the end of the Cretaceous. ○The retreat of the seaways at the end of the Cretaceous has not been fully explained. ○The abruptness of extinctions at the end of the Cretaceous and the high concentration of lr found in clay deposited at that time have fueled the development of a new hypothesis. ○Extreme changes in daily and seasonal climates preceded the retreat of the seas back into the major ocean basins. ○Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects of an asteroid collision with Earth. ○Boundary clay layers like the one between the Mesozoic and Cenozoic are used by scientists to determine the rate at which an extinct species declined. 254 Mail@liuwenyong.com 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 1. ○4 2. ○3 3. ○2 4. ○1 5. ○1 6. ○4 7. ○1 8.○1 9. ○2 10. ○4 11. ○2 12. ○3 13. ○3 14. ○1 , 3, 5 255 Mail@liuwenyong.com 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在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 100000 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在...
View Full Document

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.

Ask a homework question - tutors are online