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考研英语完形填空在线模拟试题

考研教育网   2010-11-23 15:03 【 】【我要纠错
8. [A] diluted [B] dissolved [C] dispersed [D] diffused
  [答疑编号1000020208]
  『参考答案』A
  『答案解析』本题目选择动词过去分词形式,构成 "be…to "的短语。选项A. diluted 稀释的(可以用在液体或气体的稀释);B. dissolved 溶解(通常指固体溶解为液体);C. dispersed 散开;D. diffused 扩散,弥漫。气味应该是被稀释或冲淡到百万分之一。因此,正确答案为A
  Strangely, some people find that they can smell one type of flower but not another,9____others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate 10 ______smell receptors in the nose. These receptors are the cells which sense smells and send 11 ______to the brain. However, it has been found that even people insensitive to a certain smell 12 _____can suddenly become sensitive to it when 13_____ to it often enough.
  9. [A] when [B] since [C] for [D] whereas
  [答疑编号1000020209]
  『参考答案』D
  『答案解析』"奇怪的是,有些人发现他们可以闻到一种花香,却闻不出另一种,……有些人却对两种花香都很敏感。" 显然构成一种对比关系,只有whereas能用于引导表示转折关系的并列句。因此,正确答案为D
  10. [A] unusual [B] particular [C] unique [D] typical
  [答疑编号1000020210]
  『参考答案』B
  『答案解析』"这意味着有些人的鼻子里缺少某种基因,这种基因是激发人鼻子里的……气味感知器所必需的。"选项A. unusual 不寻常的;B. particular 特别的,特定的;C. unique 独一无二的;D. typical 典型的。这种"气味感知器"具有感知气味这种特定的功能。因此,正确答案为B
  11. [A] signs [B] stimuli [C]messages [D]impulses
  [答疑编号1000020211]
  『参考答案』C
  『答案解析』"这些感知器是一种细胞。这种细胞能够感知气味,并且向大脑传递……"选项A. signs 标记;B. stimuli刺激;C. messages 信息,信号;D. impulses 冲动,推动。身体的各个器官向大脑传递的是信号。因此,正确答案为C
  12. [A] at first [B]at all [C]at large [D] at times
  [答疑编号1000020212]
  『参考答案』A
  『答案解析』"然而,……对某种特定气味不敏感的人也能突然变得敏感起来。"在本句中,供选的状语修饰整个句子。选项A. at first 起初;B. at all 根本;C. at large 全面地,详细地,无拘无束地; D. at times 有时。由于谓语部分的频度状语"突然"体现了时间的交替关系,句子应该表达起初不敏感。因此,正确答案为A
  13. [A] subjected [B] left [C] drawn [D] exposed
  [答疑编号1000020213]
  『参考答案』D
  『答案解析』"然而,起初对某种特定气味不敏感的人也会突然变得敏感起来,当他们经常……在这种气味中时。"选项A. be subjected to 遭受,屈服于;B. be left to 被留给……;C. be drawn to 被拖到……;D. be exposed to 暴露在……(经常接触)。语境表达的是人处于某种气味所笼罩的环境中。因此,正确答案为D

    The explanation for insensitivity to smell seems to be that the brain finds it 14 _____ to keep all smell receptors working all the time but can 15 _____ new receptors if necessary. This may 16 ______explain why we are not usually sensitive to our own smells——we simply do not need to be. We are not 17 ______of the usual smell of our own house, but we 18 _____ new smells when we visit someone else's. The brain finds it best to keep smell receptors 19 ______for unfamiliar and emergency signals 20 _____the smell of smoke, which might indicate the danger of fire.

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