3. —You had better not judge a person _______his appearance.

—I know all the people dressed _____rags are not beggars.

A．by ; in

B．in; in

C．in; by

D．by; by

在VisualBasic中按文件的编码方式不同，可将文件分为

A．顺序文件和随机文件

B．文本文件和数据文件

C．ASCH文件和二进制文件

D．数据文件和可执行文件