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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