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1、2019 版高考英语大一轮复习模块九 Unit 12课下作业牛津译林版 选修 9 . 单词 一、核心单词 1.freezing adj. 极冷的，冰冻的 adv. 极冷地 2.rank vi. they just cant be easily accessed. Now ，researchers at MIT have developed a means of getting back memories in mice suffering from Alzheimer s.The method relies on a technique that uses light to control g
2、enetically modified neurons ( 转基因神经元 ).Currently it is too early to be used in human trials as it involves inserting light emitting(发光 ) equipment into the subjects brains ， but the same principles still apply ，the researchers said. “The important point is that this is evidence of the concept.That i
3、s ，even if a memory seems to be gone，it is still there.Its a matter of how to get it back， ”said the senior researcher Susumu Tonegawa. The team took two groups of mice, one genetically engineered to develop Alzheimer s and one healthy.They then placed them into a room and gave them a mild electric
4、shock.All of the mice showed fear when put back in an hour later.When placed in the room a third time several days later ， the Alzheimer s mice acted normally. They had forgotten the shock. The researchers were then able to bring back the memory of the shock by activating ( 激活 ) the cells in which t
5、he memories were stored.Even when the mice were put into an unfamiliar room，they showed fear when the cells associated with the shock were activated. “ Short term memories seem to be normal in order of hours.But for long term memories ，these earlyAlzheimer s mice seem to be damaged， ”said the lead r
6、esearcher Dheeraj Roy. “Directly activating the cells that we believe are holding the memory helps them get it back. This suggests that it is indeed an access problem to the information，not that they are unable to learn or store this memory.” 【语篇导读】本文主要介绍了利用光控制转基因神经元使早老性痴呆病患者恢复记忆的技 术。 5.What can we
7、learn about the researchers at MIT? A.They are the pioneers of brain research. B.They have used the method in human trials. C.They can cure Alzheimer s using the new method. D.They can get back memories in mice with Alzheimers. 答案D 细节理解题。根据第二段的第一句可知，他们能够使患有早老性痴呆病的老鼠恢 复记忆。 6. Why did the Alzheimers m
8、 ice behave normally the third time? A.They failed to remember the electric shock. B.They were accustomed to the situation. C.They managed to overcome the fear. D.They activated the association automatically. 答案A 细节理解题。根据第四段的“.the Alzheimers mice acted normally.They had forgotten the shock”可知，这些老鼠忘记
9、了受到的电击。 7.For longterm memories ， the earlyAlzheimer s mice _. A.can transform their brain cells B.can t learn new tricks well C.can easily get back their memories D.cant access the information stored 答案D 推理判断题。根据最后一段可知，对于长期记忆来说，这些处于早老性痴呆病早 期的老鼠因为(脑细胞 ) 已经被损害，不能使用这种已经储存的信息。 8.The main purpose of the text is to _. A.introduce a method of a research B.report the latest discovery about a disease C.give advice on how to improve memories D.explain how a brain stores information 答案B 写作意图题。通读全文可知，本文的主要目的是报道关于早老性痴呆病的最新发 现。