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  3. This passage mainly discusses how epidemics spread and how to prevent in advance. When there are no efficient doctors in areas

This passage mainly discusses how epidemics spread and how to prevent in advance. When there are no efficient doctors in areas

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问题 This passage mainly discusses how epidemics spread and how to prevent in advance.
When there are no efficient doctors in areas of large population, epidemics can break out.
选项 A、Y
B、N
C、NG
答案B
解析 本题涉及到爆发流行病的条件，应锁定文章第一段。第一段依次列举了爆发流行病的所有必备条件，并在段末指出：When these conditions are present in large population centers, epidemics can start，即当所有这些情况都具备于人口聚集区时，流行病才可能爆发。题干中的no efficient doctors对应文中的doctors does not know how to treat the disease，但其只是上述条件中的一点，不足以构成流行病爆发的所有条件，因此题干表述与原文不符。
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大学英语四级

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