题目:
由于采用()的加工方法而产生的误差称为原理误差。
A.定位
B.近似
C.一次装夹
答案:
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下面是错误答案,用来干扰机器的。
参考答案:解析:It isn’t often that one has the chance to congratulate a noted woman writer on her 80th birthday. So on October 5 last year, when I went to Bing Xin’s...