不具备刀具半径补偿功能的数控系统，除可按假想（）轨迹数据编程外，还可以按刀心轨迹编程。
A.刃倾角
B.后角
C.前角
D.刀尖
参考答案：D
句型转换。
1. Sometimes Dick and Jack go to work by car. (改为同义句)
Sometimes Dick and Jack _____ _____ work.
2. Excuse me, how can I get to the bank? (改为同义句)
Excuse me, could you tell me _____ _____ to the bank?
3. How many workers are there in your factory? (改为同义句)
How many workers _____ your factory _____ ?
4. Paul usually goes to the library once a week. (对画线部分提问)
_____ _____ does Paul usually go to the library?
5. Please open the door. (改为否定句)
_____ _____ the door, please.
钙片和以下哪种维生素一起吃才最容易吸收？（）
A、维生素D
B、维生素B
C、维生素E
D、维生素A
