2. 外语
  3. A bird flu, a massive earthquake, a monster storm and a terrorist attack are all threats to major cities in the U.S. Policemen,

A bird flu, a massive earthquake, a monster storm and a terrorist attack are all threats to major cities in the U.S. Policemen,

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问题 A bird flu, a massive earthquake, a monster storm and a terrorist attack are all threats to major cities in the U.S.
Policemen, firemen and emergency doctors all can be called first responders.
选项
答案Y
解析 根据题干中的信息词policemen和first responders 定位到第二个小标题下的第一段，可知括号中的内容是对first responders 的解释说明，即警察、消防员和急诊医士(EMTs)等都是first responders，故该句表述正确。
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