2. 外语
  3. According to the author,what may be the possible carriers of bird flu? According to the study team, ______ is a practice that c

According to the author,what may be the possible carriers of bird flu? According to the study team, ______ is a practice that c

admin2009-08-19  50
问题 According to the author,what may be the possible carriers of bird flu?
According to the study team, ______ is a practice that can encourage transmission of the bird flu.
选项
答案grazing in huge flocks
解析 根据题干中的关键词study team和encourage transmission定位到倒数第二段，可知研究组表示，迁徙的鹅可能也是病毒携带者，因为它们经常聚在一起吃草，而这可能会促使病毒的传播。
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