位置精度较高的孔系加工时,特别要注意孔的加工顺序的安排,主要是考虑到()。
A、坐标轴的反向间隙
B、刀具的耐用度
C、控制振动
D、加工表面质量
参考答案:A
制备一组马歇尔试件的个数一般为( )。
A.3个左右
B.4个左右
C.3~6
D.4~6
—I' m surprised to hear that Sue and Paul have ________.
—So am I. They seemed very happy together when I last saw them. [ ]
A. broken up
B. finished up
C. divided up
D. closed up