【单选题】【消耗次数：1】
关于内文版式，描述错误的是?
①
版心上方空白称天头
②
版心指版面上用于印刷的面积
③
版心下方空白称地脚
④
靠装订线的空白称书口
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shall
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a few
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littlle
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with
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