为使零件的几何参数具有互换性，必须把零件的加工误差控制在给定的范围内。
参考答案：对
(2013·辽宁高考)At no time ________ the rules of the game. It was unfair to punish them.
A．they actually broke
B．do they actually break
C．did they actually break
D．they had actually broken
1968年世界医学会规定了医生确定死亡的道德责任和器官移植的道德原则是（）
A.《赫尔辛基宣言》
B.《日内瓦宣言》
C.《东京宣言》
D.《夏威夷宣言》
E.《悉尼宣言》
