为什么在镗削工件时，在粗镗加工结束后，要将压板松一下？

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问题问答题简答题

答案

参考答案：

在粗镗加工中吗，切削余量大，切削力大，为防止工件移动，作用在工件的夹紧力大，引起的弹性变形也大，而精加工切削余量小，切削力小.

句型转换

1. His name is Nick. (改为同义句)

_____ Nick.

2. Her last name is Green. (改为同义句)

Her _____ name is Green.

3. Linda is thirteen years old. (对划线部分提问)

_____ _____ is Linda?

4. She is my friend. (改为一般疑问句,并作肯定回答)

—_____she _____ friend?

—Yes, she _____.

5. They are from Beijing. (改为否定句)

They _____ from Beijing.

问答题简答题

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