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When enough people in a community are ___ against a certain disease, it's harder for that disease to spread, and the entire community is less likely to be infected.(vaccination)

When enough people in a community are ___ against a certain disease, it's harder for that disease to spread, and the entire community is less likely to be infected. (vaccination)

题目解答

答案

问题解析

这个问题考察的是对“群体免疫”(Herd Immunity)概念的理解。群体免疫是指当一个社区中有足够多的人对某种疾病具有免疫力时,这种疾病在社区中的传播就会变得困难,从而保护了整个社区,包括那些没有免疫力的人。

题目中的空白处需要填入一个与“vaccination”(疫苗接种)相关的词,以描述人们如何获得对某种疾病的免疫力。

详细解析

  1. 背景知识:

    • 疫苗接种(Vaccination):通过接种疫苗,人体会产生针对特定病原体的免疫反应,从而获得免疫力。
    • 群体免疫(Herd Immunity):当一个社区中有足够多的人对某种疾病具有免疫力时,即使有少数人没有免疫力,这些人的风险也会大大降低,因为疾病在社区中的传播途径被阻断了。
  2. 题目分析:

    • 题目提到“当一个社区中有足够多的人对某种疾病具有免疫力时,这种疾病在社区中的传播就会变得困难,整个社区被感染的可能性就会降低”。
    • 这里的“免疫力”是通过疫苗接种获得的。
  3. 填空选择:

    • 题目中提到的“vaccination”(疫苗接种)是一个关键线索。
    • 人们通过疫苗接种获得对某种疾病的免疫力,因此空白处应填入“vaccinated”(接种疫苗的)。

答案

When enough people in a community are vaccinated against a certain disease, it's harder for that disease to spread, and the entire community is less likely to be infected.

解释

  • vaccinated:接种疫苗的。当一个社区中有足够多的人接种了疫苗,他们对某种疾病具有免疫力,从而减少了疾病在社区中的传播机会,保护了整个社区。

解析

本题考查词汇的正确形式运用以及对“群体免疫”概念的理解。解题思路是根据句子语境和所给单词“vaccination”,判断出此处需要一个表示“被接种疫苗”含义的形容词来描述人们的状态。

  1. 首先明确“vaccination”是名词,意为“疫苗接种”,而句子中“are”后面需要一个形容词来描述“people”的状态。
  2. “vaccinate”是动词,其过去分词形式“vaccinated”可以用作形容词,意思是“接种疫苗的”,符合句子表达“人们被接种疫苗”的语境。
  3. 结合“群体免疫”的概念,当社区中有足够多的人接种疫苗后,疾病传播会更困难,整个社区被感染的可能性降低,“vaccinated”填入后句子逻辑通顺。

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