被加工零件的径向尺寸在图样上和测量时,一般用()表示。
A.半径值
B.直径值
C.周长
D.弧长
参考答案:B
—How can we make people know the latest movie The City o f Li fe and Death?
—We can _ some posters. [ ]
A. put off
B. put up
C. put on
切断时,切断刀的刀头宽度和切入深度相等。( )