A. I am going to have a new computer B. I got a computer yesterday C. I want to have a computer D. I have got a new computer
A. 齿顶圆和齿根圆 B. 齿顶圆,分度圆,基圆和齿根圆 C. 齿顶圆,分度圆,基圆,节圆,齿根圆 D. 分度圆,基圆和齿根圆
A. 一离去 B. 二离去 C. 三离去 D. 一离去和二离去