问题
多项选择题
一般,剪切角增加,则()。
A.切屑变形程度减小
B.切削力变小
C.切削变形系数变大
D.切屑底层与前刀面的摩擦加剧
答案
参考答案:A, B
一般,剪切角增加,则()。
A.切屑变形程度减小
B.切削力变小
C.切削变形系数变大
D.切屑底层与前刀面的摩擦加剧
参考答案:A, B
选词填空(共10小题,每小题1分,共10分)
My name is Peter. I _小题1:__ got a dog. I like the dog very much, ___小题2:__ I don’t know how to look after(照顾) him. There _小题3:___ a library in front of my house. So I often go there to _小题4:___some books about dogs after school. Every morning I walk ___小题5:___ Bob behind my house. There are __小题6:___ dogs there. Bob can play with other _小题7:___ there. He likes __小题8:___ with balls. He likes meat best, so I often go to buy some for___小题9:____. I also __小题10:___ a small bed for him in my room. Bob likes it very much. |