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. The author

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

admin2013-06-02  70
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.
The author does an assessment of all high-risk urban areas in the U.S.
选项
答案NG
解析 根据题干中的信息词assessment和high-risk urban areas 定位到第一个小标题下的第二段，可知作者等人对10个高危城市地区进行了独立评估，主要针对的是安全指数，但文章并没有说明受评估的10个城市地区是否涵盖了美国所有的高危城市。
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大学英语六级

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