数控加工仿真软件中根据（）判断切削参数是否准确
A、F．S参数
B、加工时间
C、实时材料去除量
D、材料去除总量
参考答案：C
Not until _____ her work _____ her favorite TV show. [ ]
A. She completed; did she watch
B. did she complete; she watched
C. She completed; had she watched
D. did she complete; did she watch
扣件式钢管脚手架使用的水煤气输送钢管规格是（）。
A.φ48mm×3.5mm
B.φ50mm×3.5mm
C.φ55mm×4.5mm
D.φ48mm×4.25mm
