题目：
夹具的误差计算不等式：△定位+△装夹+△加工≤δ工，它是保证工件______的必要条件。
A．加工精度
B．定位精度
C．位置精度
答案：
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参考答案：D解析：[知识点] 工程质量控制
夹具的误差计算不等式：△定位+△装夹+△加工≤δ工，它是保证工件______的必要条
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