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【单选题】
加工粉末冶金零件的切削刀具最好采用( )刀具 。A.
高速钢
B.
硬质合金
C.
陶瓷
D.
金刚石
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反馈参考答案：
举一反三
【单选题】Where is the man going?
A.
He is going home.
B.
He is going to school.
C.
He is going to his office.
【简答题】求函数 的间断点,并指出间断点的类型。
【单选题】______ last Friday, he would have got to Paris.
A.
Would he leave
B.
Had he left
C.
If he is to leave
D.
If he was leaving
【单选题】______ last Friday, he would have got to London.
A.
Would he leave
B.
Had he left
C.
If he is to leave
D.
If he was leaving
【简答题】A．He is going to write a paper. B．He is going to a football . C．He is going to sleep all morning. D．He is going downtown with some guys.
【简答题】设函数 ，求f(x)的间断点并指出其类型
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