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【简答题】
数控车床加工位置补偿用指定的T代码来实现,T代码后的四位数字中,前两位为( ),后两位为( )。
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反馈参考答案：
举一反三
【简答题】求由摆线 x = a ( t - sin t ) , y = a (1 - cos t ) 的一拱 (0 £ t £ 2 p ) 与横轴所围成的图形的面积 .
【简答题】In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be____36____ . Today things are___37_____, the world...
【单选题】— 2008 is drawing near. Any changes in Beijing? — Yes, more stadiums arc being built, and ______ people are learning English. [ ]
A.
more and more
B.
the more and the more
C.
the more and more
D.
more and the more
【单选题】―Were there any sharks in the aquarium? ―______. [ ]
A.
Yes, there were
B.
No, there wasn't
C.
Yes, there was
D.
No, there were
【单选题】Were there any sesame streets in 1969?
A.
Yes, they taught Children.
B.
No, they were imaginary.
C.
Yes, they were in the South Africa.
D.
No, they were in the future.
【单选题】--- ___________ there any sharks in the aquarium? --- No, we didn’t see any.
A.
Did
B.
Had
C.
Have
D.
Were
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