问题
单项选择题
高速钢刀具磨损的最常见形式是（）。
A.相变磨损
B.磨粒磨损
C.扩散磨损
D.黏结磨损
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
高速钢刀具磨损的最常见形式是（）。
A.相变磨损
B.磨粒磨损
C.扩散磨损
D.黏结磨损
参考答案：A
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| Children in the USA like K Day very much. K is short for 1 . March 7 is 2 . On that day 3 children go out in the open air. They 4 their kites with them. Some kites are very big. 5 are small. They are in 6 colors. So they look very beautiful. 7 has a long string (细绳). To get the kites 8 , the children begin to run. They let out the 9 from the ball in their hands. Now the kites 10 in the air. How nice they look! | ||||
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