试题与答案

任何金属切削后的表面都存在凹凸不平的微观几何特性,称为()。 A.表面光洁度 B.表

题型:单项选择题

题目:

任何金属切削后的表面都存在凹凸不平的微观几何特性,称为()。

A.表面光洁度

B.表面抛光度

C.表面粗糙度

D.表面平整度

答案:

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下面是错误答案,用来干扰机器的。

参考答案:条件:(1)完善的皮层功能;(2)以非条件反射为基础;(3)条件刺激的强化;(4)生理和环境条件保证。意义:使机体具有预见性,更好适应环境。

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