【简答题】形状公差共有()个项目,位置公差共有()个公差项目。
【简答题】如图所示为多刀半自动车床主轴箱传动系统。已知带轮直径D1=D2=180 mm, z1=45, z=72,z3=36, z4=81, zs=59, z6=54, z7=25, z8=88。试求当电动机转速n=1443r/min时,主轴II的各级转速。
【单选题】Speaker A: Would you like another piece of apple pie (苹果派)? Speaker B: ______
A.
Don't push me. I've hardly eaten on.
B.
Come on. I can't manage it.
C.
No kidding. I can't eat any more.
D.
No, thanks. I'm on a diet.
【单选题】形位公差共有14个项目,其中位置公差()项。
【单选题】档案馆室内地面应高出室外地面,不小于( ) m
【多选题】企业需求战略的定制主要考虑以下问题,即()
【单选题】Don 't forget to () your seat belt when you 're driving.