— Is there a TV in your bed room?

— _______. But there is a big TV in the living room. [ ]

A. Yes, there is

B. Yes, it is

C. No, there isn't

D. No, it isn't

铣螺旋糟时，工件每旋转一周，刀具要相对工件沿轴向进给（）

A、工件轴的直径值

B、螺旋糟的螺旋角

C、一个螺旋糟的螺距

D、一个螺旋糟的导程