第1个回答 2009-05-02
6个
分别是：
pacific time zone
mountain time zone
central time zone
eastern time zone
atlantic time zone
newfoundland time zone本回答被提问者采纳
分别是：
pacific time zone
mountain time zone
central time zone
eastern time zone
atlantic time zone
newfoundland time zone本回答被提问者采纳
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