单项选择题

"scrolling" is a technique most commonly associated with（）

A．disk
B．display
C．printer
D．memory

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单项选择题

（）processing offers many ways to edit text and establish document formats. you can easily insert, delete, change, move and copy words or blocks of text.

A．Data
B．Database
C．Word
D．File

单项选择题

The（）is a temporary storage area that you can use to copy or move selected text or object among application.

A．cache
B．pool
C．buffer
D．clipboard

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