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The primary purpose of the passage is to______ The passage suggests that if the researchers had not found that two extinct carn
The primary purpose of the passage is to______ The passage suggests that if the researchers had not found that two extinct carn
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2009-04-18
89
问题
The primary purpose of the passage is to______
The passage suggests that if the researchers had not found that two extinct carnivore species were free of tooth breakage, the researchers would have concluded that______
选项
A、the difference in breakage frequencies could have been the result of damage to the fossile remains in the La Brea pits
B、the fossils in other Pleistocene sites could have higher breakage frequencies than do the fossils in the La Brea pits
C、Pleistocene carnivore species probably behaved very similarly to one another with respect to consumption of carcass
D、all Pleistocene carnivores species differed behaviorally from present-day carnivore species.
E、predator desities during the Pleistocene era were extremely high
答案
A
解析
This question asks you to identify a conclusion that the researchers might have reached if the y had not found the two extinct carnivore species that were free of tooth breakage. The best answer is A. The researchers used the evidence of extinct carnivore species that were free of tooth breakage to eliminate preservational bias, that is, to eliminate the possibility that fractures were caused by abrasion in the pits. If every extinct species found had shown tooth breakage, the possibility that factures were caused by abrasion within the pits could not have been eliminated, and the researcher would have concluded that the damage could have occurred in the La Brea pits. Choice B is incorrect because there is nothing in the passage to suggest the relevance of these two species to predicting breakage frequency at other sites. Choice C can be eliminated because the passage suggests that if every extinct species found in the La Brea pits showed tooth breakage, researcher would have considered that preservational bias, not similarity of consumption behavior in Pleistocene carnivores species, was responsible for the finding. Choice D can be eliminated because the passage suggests that if every extinct species found in the La Brea pits showed tooth breakage, researchers would have concluded that the fractures could have been caused by preservational bias rather than by behavior in Pleistocene carnivore species that differed from behavior in present day species. Choice E is incorrect: if every extinct species found in the La Brea pits showed tooth breakage, the breakage could have been attributable to preservational bias rather than to high predator densities during the Pleistocene era.
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GMAT VERBAL题库GMAT分类
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