问题
单项选择题
在车床上加工轴,用三爪卡盘安装工件,相对夹持较长,它的定位是()。
A.六点定位
B.五点定位
C.四点定位
D.三点定位
答案
参考答案:C
在车床上加工轴,用三爪卡盘安装工件,相对夹持较长,它的定位是()。
A.六点定位
B.五点定位
C.四点定位
D.三点定位
参考答案:C
补全对话。 | |
B: It was a great trip. I really enjoyed Sydney and Melbourne. A: 2____ B: For half a month. A: 3____ B: I was in Sydney for about five days. A: Wow, that's a long time. 4____ B: It was hot and sunny the whole time. A: 5____ B:Oh, it was wonderful. And the wildlife was terrific. We saw some Koalas! |