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【简答题】
在数控机床中,机床直线运动的坐标轴X、Y、Z按照ISO和我国的JB3051-82标准,规定为 。 2 、对于工件旋转的机床,Z轴的方向为 正方向为 。 3 、数控机床的参考点两个主要作用 和 。 4 、数控机床是用数字化代码来控制 的相对运动,从而完成零件的加工。
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to be set
B.
being set
C.
setting
D.
has set
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操作系统
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That she read the handouts prior to the workshop
B.
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操作系统
B.
数据库管理系统
C.
CPU
D.
专用软件
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Right
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商品属性
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文化属性
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既有商品属性,也有文化属性
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都不具有
【单选题】The man thinks that to prepare for the exams, the first thing is to figure out______.
A.
the timetable of the exams
B.
the content of the exams
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what's likely to come up
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the revision priorities
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