Human beings are afraid of rats mainly because ______. Brown rats are dangerous because ______.

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问题 Human beings are afraid of rats mainly because ______.
Brown rats are dangerous because ______.

选项 A、they carry fleas which give men bubonic plague
B、they come with typhus
C、they carry thirty-five diseases
D、they killed 200 million people

答案C

解析 见文章的第二段中“...but brown rats carry thirty-five other diseases— typhus for example.”,选项B的“typhus”是褐鼠带来的一种疾病之一,以偏概全;因此正确答案是C。
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