数控镗床的工艺特点及技术措施主要有（）。
A.应选择适合于数控镗床加工的工件
B.要安排其他设备完成数控镗床加工前的准备工序和数控镗床加工后的精化工序
C.在数控镗床加工前，精化零件毛坯，只留少量加工余量
D.毛坯材质均匀，铸锻件须消除内应力
E.尽可能选用较大的切削用量，选择合适的刀具和夹具，主轴刚度好时，可采用多刀多刃复合加工
F.合理安排加工工序
参考答案：A, B, C, D, E, F
| 短语辨析。 从方框里选择正确的短语，并用其正确的形式填空。 | |
2. In the game he _____ the basket 11 times but had only 5 succes ses. 3. Should I ____with you for the next two days? 4. Young people ____ to beautify our city. 5.____the past libraries, today's libraries are equipped much better. 6. The ages of the kids in the kindergarten_____2 years old ____6 years old. 7. The 1666 London fire____ many important buildings____. 8. Don't _____,boys;there's no danger. 9. I'm ____her safety. 10. My leg got hurt, but I____ home. |