顶尖分（）两类。前顶尖,前顶尖随同弓箭一同旋转,与中心孔没有相对运动,因而不产生摩擦。 后顶尖插入尾座套筒锥孔中的顶尖叫后顶尖,后顶尖分固定顶尖和回转顶尖两种

A．工件  B．刀架  C．主轴轴线  D．溜板

A. 3

B. 2

C. 4

D. 5

此题为判断题(对，错)。

A、尺寸

B、精度

C、位置

D、距离

现有数值如下:-1.71,0.6,0.31,-0.79,1.54,0.84,1.06,-1.17,-0.75,-0.72,-0.95,-0.24,-0.7,0.24,-1.56,-0.16,-0.85,-0.86,-0.48,-0.44,0.22,0.13,-0.01,0.87,0.9,0.09,-1.06,0.32,-0.66,-0.09,-1.2,-1.07,0.8,-0.11,-1.69,-1.07,0.63,-0.1,0.34,0.13,0.35,1.36,-0.35,-0.75,-1.53,0.02,-0.87,0.65,0.4,0.84,0.57,0.42,-0.31,0.17,-0.22,0.75,0.2,-1.38,-0.14,1.91,0.35,-2.02,2.06,0.61,-1.41,0.36,-0.16,0.17,-0.8,-2.58,-1.69,1.71,-0.29,1.92,-0.98,1.74,1.19,0.06,0.38,1.32,-1.39,1.47,1.79,0.59,-1.3,-0.29,1.54,0.76,1.81,1.1,0.4,0.12,0.05,0.61,-0.1,0.07,-0.82,2.02,1.26,0.88;请用这些数值构建一个“先行后列”的行列数目相等的方矩阵,则其对角线上元素之间的增量百分比是多少 请将答案写在下面,如果有字母则全小写,数值之间以“英文逗号”分割!所有小数小数点后保持两位小数,整数数后加小数点和一个0;例如5.0;