单选题：阅读以下文章，回答题Which of the following area has the highest averag

题目内容：

阅读以下文章，回答题

Which of the following area has the highest average population density?
A．Iceland．
B．Canada．
C．Puerto Rico．　　
D．Netherlands．

参考答案：

答案解析：

A crowd gathered to see what had happened．

A crowd gathered to see what had happened． A．collected B．fixed C．divided D．assis

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None of the Americans who donates a kidney during the period lasting from 1994 t

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