问题
单项选择题
Header and footer are strings of text that are placed at the__(73)__of each page of a document.
A．left or right
B．up or down
C．above or below
D．top or botton
答案
参考答案：D
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Header and footer are strings of text that are placed at the__(73)__of each page of a document.
A．left or right
B．up or down
C．above or below
D．top or botton
参考答案：D