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      2019年6月英语四级阅读真题及答案 第2套 选词填空

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      Just because they can't sing opera or ride a bicycle doesn't mean that animals don't have culture. There's no better example of this than killer whales. As one of the most __26__ predators (食肉动物), killer whales may not fit the __27__ of a cultured creature. However, these beasts of the sea do display a vast range of highly __28__ behaviors that appear to be driving their genetic development.

      The word "culture" comes from the Latin "colere," which __29__ means "to cultivate." In other words, it refers to anything that is __30__ or learnt, rather than instinctive or natural. Among human populations, culture not only affects the way we live, but also writes itself into our genes, affecting who we are. For instance, having spent many generations hunting the fat marine mammals of the Arctic, the Eskimos of Greenland have developed certain genetic __31__ that help them digest and utilize this fat- rich diet, thereby allowing them to __32__ in their cold climate.

      Like humans, killer whales have colonized a range of different __33__ across the globe, occupying every ocean basin on the planet with an empire that __34__ from pole to pole. As such, different populations of killer whales have had to learn different hunting techniques in order to gain the upper hand over their local prey (猎物). This, in turn, has a major effect on their diet, leading scientists to __35__ that the ability to learn population-specific hunting methods could be driving the animals, genetic development.

      A) acquired
      B) adaptations
      C) brutal
      D) deliberately
      E) expressed
      F) extends
      G) habitats
      H) humble
      I) image
      J) literally
      K) refined
      L) revolves
      M) speculate
      N) structure
      O) thrive

      重点单词   查看全部解释    
      genetic [dʒi'netik]

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      adj. 基因的,遗传的,起源的

      联想记忆
      certain ['sə:tn]

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      adj. 确定的,必然的,特定的
      pron.

       
      instinctive [in'stiŋktiv]

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      adj. 本能的,天性的,直觉的

       
      planet ['plænit]

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      n. 行星

       
      display [di'splei]

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      n. 显示,陈列,炫耀
      vt. 显示,表现,夸

       
      cultivate ['kʌltiveit]

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      vt. 培养,耕作,栽培,结交(朋友), 促进增长,教养

      联想记忆
      opera ['ɔpərə]

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      n. 歌剧
      n. 挪威Opera软件公司的浏览

      联想记忆
      pole [pəul]

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      n. 杆,柱,极点
      v. (用杆)支撑

       
      thrive [θraiv]

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      vi. 兴旺,繁荣,茁壮成长

       
      prey [prei]

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      n. 被掠食者,牺牲者
      vi. 捕食,掠夺,使

       
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