题目内容：
根据以下资料回答题
Why does the author state that icebergs are rarely seen?
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答案解析：
填空题：根据以下资料回答题Why does the author state that icebergs are rarely
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Why does the author state that icebergs are rarely seen?
__________ __________ __________ __________ __________ __________ __________ __________ __________ __________.