在进行数控机床辅助功能确定时，要确定的主要内容有（）。 A.换

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问题多项选择题

在进行数控机床辅助功能确定时，要确定的主要内容有（）。

A.换刀

B.主轴正、反转

C.切削液开、停

D.工件装夹

E.刀具使用寿命时间

F.测量安排

答案

参考答案：A, B, C

填空题

根据下列句子意思及汉语提示，在下面横线上写出恰当形式的英语单词。

1. Jim is _________ (外向的) than Julie.

2. Thanks for your _________ (邀请) to your birthday party.

3. He _________ (决定) to go to Beijing, but he didn't go.

4. It's _________ (必要的) to tell her to come to school tomorrow.

5. The man is very old. He often _________ (忘记) things.

6. I think going _________ (野营) in the forest is a good activity.

7. This baby is too young, he has only two _________ (牙齿).

8. I _________ (几乎不) ever had meat when I was young.

9. You can get a lot of _________(信息) from the Internet.

10. Mid-Autumn Day is a _________ (传统的) Chinese festival.

计算题

如图所示，一根长为 m的竖直放置的细杆，从高空自由落下，求杆经过其静止时距下端m的点所需要的时间。