将A盘上的文件GONG在原盘上做一备份，应键入（）命令。

A:COPY GONG A： B:COPY A：CONG A：GONG1 C:COPY A：GONG D:COPY GONG GONG1

下列命令中，仅拷贝表文件结构的命令是

A:COPY TO B:COPY STRUCTURE TO C:COPY FILE TO D:COPY STRUCTURE TO EXETENDED

下列命令中，仅拷贝表文件结构的命令是______。

A:COPY TO B:COPY STRUCTURE TO C:COPY STRUCTURE TO D:COPY STRUCTURE TO EXETENDE

将当前表文件内容复制到工资．DBF中的命令是 ______。

A:COPY TO工资 B:COPY FILE TO工资 C:COPY STRU TO工资 D:COPY STRU EXTE TO工资

I ________ it myself __________ your homework.

A: prefer do; rather than copy B: prefer doing; than copy C: prefer to do; rather than copy D: prefer doing; to copy

I ________ it myself ________ your homework.

A: prefer do; rather than copy B: prefer doing; than copy C: would do; rather than copy D: would rather do; than copy