在数控机床上安装工件,在确定定位基准和夹紧方案时,应力求做到设计基准、工艺基准与()的基准统一。
A.夹具
B.机床
C.编程计算
D.工件
参考答案:C
情景选择。
1. 圣诞节那天,你见到了好朋友Amy,会说:[ ]
A. Hello!
B. Merry Christmas!
2. 同学来你家玩,你首先应说:[ ]
A. How are you?
B. Welcome to my home.
3. 妈妈在做饭,你想帮忙,你会说:[ ]
A. Can I help you?
B. Give you a knife.
4. 同学在你家玩得很愉快,会说:[ ]
A. Goodbye.
B. I have a good time.
5. 吃饭时,你想劝同学随意吃,别客气,会说:[ ]
A. Let me help you.
B. Help yourself.
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