摘要：
在DOS中输入 <command> /? 即可实例：DOS中键入 copy /?即会输出：COPY [/D] [/V] [/N] [/Y | /-Y] [/Z] [/L] [/A | /B ] source [/A | /B] [+ source [/A | /B] [+ ...]] [destination [/A | /B]] source Specifies the file or files to be copied. /A Indicates an ASCII text file. /B Indicates a binary file. /D Allow the dest 阅读全文