According to the American federal government ？
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According to the American federal government, residents of Hawaii have the longest life ______ :77.2 years.
A)rank B)span C)scale D)scope
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Bspan最长的生命周期
根据美国联邦政府的资料，夏威夷居民的寿命最长达到77.2岁。
scope指范围，范畴，领域等；rank指等级、阶级；scale指刻度，比例，数值范围等。