河南省安阳三十五中2018届高三终极押题(4) - 英语试题 - 《高中生》杂志 ● 新高考网
河南省安阳三十五中2018届高三终极押题(4)
作者:佚名 发布时间:2018-06-06 12:32:13 本文来源于:资源库
  D

  Ever feel like scratching yourself when you see others doing it? You’re probably not alone. This practice, which seems to be socially contagious (传染的), could be more than just a sudden urge. This is according to the latest finding from Washington University.

  The researchers studied mice to see what went on in their brains when they saw other mice scratching. During the experiments, a mouse was placed in front of a computer screen to watch another of its kind scratching. A few moments after watching the video, the live mouse would start scratching. The finding is interesting because earlier studies had shown that mice only show empathy (共鸣) with individuals they know and the mouse on the screen was a stranger for the live mouse. This means that empathy may have nothing to do with the need to scratch.

  When the researchers analyzed the brain activity of the mice after viewing the video, they recorded increased level of gastrin-releasing peptide (GRP). In the previous research, GRP is found to be responsible for transferring the itch (痒) feeling between the brain and the skin. However, when researchers blocked the GRP’s function, the mice simply stopped scratching in response to seeing other mice scratching. This means that mice have no control over their scratching when seeing peers (同伴) scratching. The mouse doesn’t see another mouse scratching and then thinks it might need to scratch. Instead, its brain begins sending out itch signals using GRP as a messenger.

  It’s not clear if the exact same pathway exists in humans. But the team believes the study could help throw light on the neural mechanisms (神经机制) behind contagious behaviors in human beings. The next time you scratch in response to someone else doing it, remember it’s really not a choice, nor a psychological response; it’s hardwired into your brain.

  32. What have the latest experiments found?

  A. Mice only imitate the act of their familiar peers. B. Mice prefer the mice on a computer screen to the live ones. C. Mice feel the need to scratch when seeing another scratching. D. Mice just have to scratch when seeing another scratching.

  33. What can we learn about GRP? A. The mouse decreased its GRP when seeing other mice scratching. B. GRP is meant to block the itching and scratching feeling. C. Without GRP’s function, the mice wouldn’t copy the scratch.

  D. GRP exists and functions the same in human brains.

  34. The underlined word “hardwired” in the last paragraph probably means ________. A. changed B. mended C. stopped D. fixed

  35. Which is the best title? A. The Contagious Scratch B. The Clever Imitation

  C. The Strange Behavior D. The Common Response

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