History is ( ) a subject that only lets us know something in history; it also tells us a lot of truth.

A．less than

B．more than

C．no more than

D．not more than

图形交互式自动编程是采用（）和键盘，通过激活屏幕上的相应菜单，画出工件雪干苔，采用回答问题的方式输入刀具进给速度、主轴转速、走刀路径等信息将工件重工程字编制出来。

A.跟踪球

B.鼠标

C.手写板

D.光电笔