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Unlike herbivores and omnivores, predators have traditionally been thought n
Unlike herbivores and omnivores, predators have traditionally been thought n
游客
2025-02-19
9
管理
问题
Unlike herbivores and omnivores, predators have traditionally been thought not to balance nutrient intake because of the assumption that animal tissue as a food source varies little and is nutritionally balanced. But chemical analysis of invertebrate prey reveals remarkable variation in nutrient composition among species; even within species, nutrient composition may vary considerably. Greenstone suggested that predators may select food items according to their nutrient contents. Jensen et al (2011) have shown experimentally that even sit-and-wait invertebrate predators with limited mobility can work to address nutrient deficiencies. The wolf spider, for instance, has been shown to regulate nutrient intake by extracting more dry mass from a prey item if it contains a higher proportion of a nutrient that was deficient in the previous prey. [br] Which of the following best describes the organization of the passage as a whole?
选项
A、A phenomenon is described, and an interpretation is offered.
B、A claim is made, and the corroborating evidence is evaluated.
C、A hypothesis is presented and undermined by recent findings.
D、A contrast is noted and shown to be specious based on recent findings.
E、A series of assumptions is presented and shown to be based on sound reasoning.
答案
C
解析
对于这种结构性主旨题,基本的原则是正确选项的“虚词”要能在原文中都找到对应。同时,本文是 “老观点—批判—新观点”的结构,因此从规律上讲,正确选项应该同时包含可以表达“老观点”“新观点”和“批判”的关键词。C项a hypothesis对应第一句的老观点,recent findings对应格林斯通和延森等人的研究,undermine对应第二句对前一句的批判。A项描述的是总分结构。B项描述的是总分结构。D项a contrast在文中没有对应。E项描述的是总分结构。
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