试题与答案

工艺系统有力的作用下产生变形和位移,加工工件时造成工件几何形状和尺寸()。A、公差

题型:单项选择题

题目:

工艺系统有力的作用下产生变形和位移,加工工件时造成工件几何形状和尺寸()。

A、公差

B、偏差

C、上差

D、误差

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:肾上腺皮质功能亢进时或服用过量的糖皮质激素后,可出现圆脸、厚背、躯干发胖而四肢消瘦的“向心性肥胖”。

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