用游标卡尺测量尺寸时，机件尺寸＝主尺整数＋游标卡尺精度＋副尺格数。（）
参考答案：错
点（-3，5）关于原点对称的点的坐标是______．
给出下面的程序代码片段，m为下列哪个值时将会输出default ( ) switch (m)case 0: System. out. println ("case 0"); case 1: System. out. println ("case 1"); break; case 2: System. out. println ("case 2"); break; default: System. out. println ("default");
A．0
B．1
C．2
D．3
