问题
单项选择题
数控编程数控系统中PLC控制程序实现机床的（）。
A.位置控制
B.各执行机构的逻辑顺序控制
C.插补控制
D.各进给轴轨迹和速度控制
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
数控编程数控系统中PLC控制程序实现机床的（）。
A.位置控制
B.各执行机构的逻辑顺序控制
C.插补控制
D.各进给轴轨迹和速度控制
参考答案：B
| 阅读下面的对话，指出能填入相应空白处的最佳答案。 | ||||
| A：What's the 1 today, Mary? B：It's May 21st. A：Oh, tomorrow is your mom's birthday. Do you 2 ? B：Of course, I do. How shall we celebrate it? A：First of all, a birthday present. What about 3 her a beautiful sweater? B：That's a good idea. I think it will make 4 happy. A：Er… shall we have a special dinner? B：Yes, Dad. How about a Chinese dinner? A：OK, I'm going to buy a sweater. You can cook at home. B：Oh, don't forget to buy a 5 . A：Certainly. | ||||
|