(单选题)

According to the passage, how many public health emergencies worldwide have outbroken since 2009?

A.3

B.4

C.5

D.6

参考答案：B

参考解析：

细节理解题。根据文章第三段的内容“… including the 2009 swine flu pandemic (猪流感) and the 2014 outbreaks of Ebola in West Africa as well as Zika virus”可知，自2009年以来，出现的全球公共卫生紧急事件包括2009年猪流感大流行、2014年西非爆发的埃博拉病毒以及寨卡病毒，再加上2019年爆发的新冠疫情，一共是4次。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语

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