题目内容

The followig is a list of computer terms. After reading it, you are required to find the items equivalent to those given in Chinese below.

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与同样尺寸参数的标准齿轮相比较，正变位齿轮的分度圆齿厚______。

A. 增大
B. 减小
C. 不变

在模数、齿数、压力角相同的情况下，负变位齿轮与标准齿轮相比较，下列参数的变化是：齿厚___；基圆半径_；齿根高____。

The following is a list of computer terms. After reading it, you are required to find the items equivalent to those given in Chinese below. Write the corresponding letters in the brackets.

2.10、解释候选码和主码的关系。