铣直齿锥齿轮时,()会引起工件齿圈径向圆跳动超差。
A.铣削时分度头主轴未紧固
B.齿坯外径与内径同轴度差
C.分度不准确
D.操作时对刀不准确
参考答案:B
The great man who led the people through the was elected president________. [ ]
A. hard time; the second time
B. hardly time; for a second time
C. hard times; for the second time
D. hard times ; the second time
在采用5C评估法进行信用评估时,最重要的因素是()
A.品德
B.能力
C.资本
D.抵押品。