When he was a student, he would get up early and work late into night, believing “______________”

A．Never too late to learn.

B．Never count your chickens until they are hatched.

C．The early bird catches the worm.

D．Everyone has his feet of clay

网卡的主要功能不包括（）

A.将计算机连接到通信介质上

B.网络互联

C.进行电信号匹配

D.实现数据传输