题目内容

在加工厚工件时，要保证加工的稳定，放电间隙要大，所以（）

A. 脉冲宽度和脉冲间隔都取最大值
B. 脉冲宽度和脉冲间隔都取最小值
C. 脉冲宽度大，脉冲间隔小
D. 脉冲宽度小，脉冲间隔大

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