2. 外语
  3. The recent identification of strains of plague resistant to drugs, and the possibility of using the microbe "yersinia pestis" as

The recent identification of strains of plague resistant to drugs, and the possibility of using the microbe "yersinia pestis" as

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问题 The recent identification of strains of plague resistant to drugs, and the possibility of using the microbe "yersinia pestis" as a chemical weapon in a war, mean that plague still______humans.
选项 A、opens up an opportunity to
B、poses a threat to
C、offers assistance to
D、remains a rival to
答案B
解析 句意：最近具有抗药性瘟疫的发现，以及把细菌“鼠疫耶尔辛杆菌”作为战争中化学武器的可能性，这都意味着瘟疫仍旧威胁着人类的生存。pose a threat to成为……的威胁。
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