数控镗床主传动系统的特点是(),所以能进行大功率切削和高速切削,实现高效率加工。
A. 精度高
B. 刚度大
C. 抗振性好
D. 转速高
E. 功率大
F. 切削力大
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Controlling costs that are associated with network issues, keeping unexpected problems from affecting productivity, and achieving business goals are characteristics of which cisco offering?()
A. cisco captial financing
B. cisco SMARTnet service
C. cisco network optimization service
D. cisco smart business roadma
我国第一部《兵役法》,是1955年颁布的。
A. 正确
B. 错误
按照狭义相对论理论,运动的时钟比静止的时钟走得快。
A. 正确
B. 错误