Zoological parks in many cities export birds from many lands and are a source of recreation for millions of people each year.
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【正确答案】 1、正确答案：export-import    
【答案解析】解析：考查动词。此句应该是说从其他地方引进鸟类，动物园原来不可能有各种鸟。export不跟from搭配，与to搭配。应改为import，import才与from搭配。