A．打印预览 B．放大镜C．关闭D．全屏显示在 打印预览 方式下，单击 （） 按钮可返回编辑文件……

单项选择题为改变该文档的文件名，常选用（）命令

A．"文件" → "别存为"
B．"文件" → "保存"
C．"插入" → "对象"　
D．"工具" → "选项"

单项选择题In （）programming, the user determines the sequence of instructions to be executed, not programmer.

A．top-down　
B．structure　
C．data-driven
D．event-driven

单项选择题Files can be lost or destroyed accidentally. Keep（）copies of all data on removable storage media.

A．backup
B．back　
C．black　
D．backdown

单项选择题（）are web sites that search the web for occurrences of a specified word or phrase.

A．Search engines
B．WWW
C．Internet　
D．Java

单项选择题The（）is a collection of computers connected together by phone lines that allows for the global sharing information.

A．interface　
B．Internet
C．LAN　
D．WWW