2. 外语
  3. What caused the health problems to workers after the September eleventh attacks according to this passage? The researchers deci

What caused the health problems to workers after the September eleventh attacks according to this passage? The researchers deci

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问题 What caused the health problems to workers after the September eleventh attacks according to this passage?
The researchers decided to study the effects on breathing first because ______ might appear in a later period of time.
选项
答案other disorders
解析 参见文章第二段第六句话。研究者们决定首先研究呼吸器官受到的影响因为其他疾病的发作期较晚。
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大学英语六级

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