试题与答案

1987年某远洋货轮发生了军团菌暴发流行。该货轮起航时载有乘客350名和船员50名。

题型:单项选择题 A3型题

题目:

1987年某远洋货轮发生了军团菌暴发流行。该货轮起航时载有乘客350名和船员50名。6月30日在佛得角群岛停留时,有1/7的乘客离开。7月份第1周内,船上有30人发生军团病,其中一半因抢救不及时而死亡。随后1周内,又有20人发病,但因处理得当没有发生死亡。症状持续1个月。

7月1~14日,军团病的累计发病率是(7月1日零点时船上的人口作为危险人口)()。

A.0.125

B.0.143

C.0.203

D.0.333

E.该资料不足以计算

答案:

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