对于齿轮的优化设计,以下设计变量的选择不合适的是
A.模数和齿数作为设计变量
B.齿数和分度园直径作为设计变量
C.模数和分度园直径作为设计变量
D.模数、齿数和分度园直径作为设计变量
正确答案是D
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