夹具的对定销装配后,只要对定销能插入和拨出分度板的分度孔,就能保证定位精度。
参考答案:错
(2013·陕西,15) —I'm tired.I'm taking next week off.
—________,honey.You do need a break.
A.Not so sure
B.Forget it
C.Great idea
D.No way
等幅中频电的频率为()
A.100-200Hz
B..1000-2000Hz
C.2000-4000Hz
D.1000-4000Hz