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【多选题】
在车床上用两顶尖装夹车削光轴,加工后检验发现中间小两头大误差,其最可能的原因不包括()A.
车床导轨磨损
B.
前后两顶尖刚度不足
C.
刀架刚度不足
D.
工件刚度不足
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举一反三
【单选题】Which of the following is true about a learning organization?
A.
A learning organization discourages learning at the group and organizational levels.
B.
A learning organization restricts employees from experimenting with products and services.
C.
In a learning organization, employees learn from failure and from successes.
D.
In a learning organization, employees are discouraged from asking questions and admitting mistakes.
【简答题】井下固定测风站的分布有何要求？
【简答题】Self-discipline is needed when one____.