在立铣床上加工V形槽时，应该采用（）加工。
A.转动立铣头法
B.角度铣刀
C.转动工件法
D.三面刃铣刀
参考答案：C
Don't quarrel with your competitor; ______, be as friendly with them as you can. [ ]
A. in a word
B. on the contrary
C. in general
D. on all sides
比值调节系统中,仪表的比值系数就是两个物料的流量比。
