题目

Rats are often _______ with spreading disease rather than _______ it, but this long-tailed animal is highly _______ . Inside a rat's nose are up to 1,000 different types of olfactory receptors (嗅觉感受器), whereas humans only have 100 to 200 types. This gives rats the ability to detect _______ smells. As a result, some rats are being put to work to detect TB (肺结核). When the rats detect the smell, they stop and rub their legs to _______ a sample is infected.Traditionally, a hundred samples would take lab technicians more than two days to _______ , but for a rat it takes less than 20 minutes. This rat detection method doesn't rely on specialist equipment. It is also more accurate — the rats are able to find more TB infections and, therefore, save more lives.A) associated B) examine C) indicate D) nuisance E) peak F) preventing G) prohibiting H) sensitive I) slight J) specify K) superior L) suspicious M) tip N) treated O) visual

Rats are often _______ with spreading disease rather than _______ it, but this long-tailed animal is highly _______ . Inside a rat's nose are up to 1,000 different types of olfactory receptors (嗅觉感受器), whereas humans only have 100 to 200 types. This gives rats the ability to detect _______ smells. As a result, some rats are being put to work to detect TB (肺结核). When the rats detect the smell, they stop and rub their legs to _______ a sample is infected.

Traditionally, a hundred samples would take lab technicians more than two days to _______ , but for a rat it takes less than 20 minutes. This rat detection method doesn't rely on specialist equipment. It is also more accurate — the rats are able to find more TB infections and, therefore, save more lives.

A) associated B) examine C) indicate D) nuisance E) peak F) preventing G) prohibiting H) sensitive I) slight J) specify K) superior L) suspicious M) tip N) treated O) visual

题目解答

答案

1. 根据“be associated with”结构，第一空填“associated”，表示“与……相关联”。 2. “rather than”后需填“preventing”，与“spreading”形成对比。 3. 老鼠嗅觉敏锐，应填“sensitive”。 4. 表示“微弱的气味”，填“slight”。 5. 老鼠通过动作“indicate”样本是否感染。 6. 实验室人员需“examine”样本，耗时较长。 答案： 1. associated 2. preventing 3. sensitive 4. slight 5. indicate 6. examine

解析

本题主要考查词汇在语境中的运用，解题时需要结合上下文的语义逻辑以及固定搭配来选择合适的单词。

  1. 第一空：“be associated with”是固定短语，意为“与……相关联”，根据语境，老鼠常与传播疾病相关联，所以此空应填“associated”。
  2. 第二空：“rather than”表示对比，前面提到“spreading disease”（传播疾病），那么与之相对的就是“preventing it”（预防疾病），所以这里要用“preventing”。
  3. 第三空：根据后文提到老鼠鼻子里有多达1000种不同类型的嗅觉感受器，而人类只有100 - 200种，可知老鼠的嗅觉很敏锐，“sensitive”有“敏感的”意思，符合语境，故填“sensitive”。
  4. 第四空：因为老鼠嗅觉敏锐，所以能察觉到微弱的气味，“slight”表示“轻微的，微弱的”，“slight smells”即“微弱的气味”，所以此空填“slight”。
  5. 第五空：当老鼠检测到气味时，它们会停下来摩擦腿，这是一种动作来表明样本是否感染，“indicate”有“表明，显示”的意思，符合文意，因此填“indicate”。
  6. 第六空：实验室技术人员的工作是检查样本，“examine”有“检查，检验”的含义，“examine samples”即“检查样本”，所以这里填“examine”。