A.屈服强度为60Mpa
B.抗拉强度为60Mpa
C.含碳量0.6%
D.含碳量6%

A.0.01mm
B.0.02mm
C.0.05mm
D.0.5mm

A.0.1
B.0.3
C.0.5
D.0.7

A.钻底孔
B.倒角
C.内孔抛光
D.三锥铰削

A.10mm
B.20mm
C.30mm
D.40mm

A.锥形冲头
B.钻模
C.划线器
D.定位器

A.15.4mm
B.25.4mm
C.35.4mm
D.45.4mm

A.0°-10°
B.15°-25°
C.25°-30°
D.40°-60°

A.灰铸铁
B.钨合金
C.镍基合金
D.碳素工具钢

A.0.1mm
B.0.05mm
C.0.02mm
D.0.01mm

A.3.5mm
B.3.25mm
C.3.75mm
D.3.95mm