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【判断题】
数控机床的电气控制系统由驱动电路和伺服电动机两个部分组成。    (    )
A.
正确
B.
错误
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【单选题】用同一平面上的三个支承点对工件的平面进行定位,能限制其( )自由度
A.
一个移动一个转动
B.
两个移动一个转动
C.
一个移动两个转动
D.
两个移动两个转动
【单选题】passage four:questions 36~40 are based on the following passage. Some houses are designed to be smart. Others have smart designs. An example of the second type of house won an Award of Excellence from...
A.
to be easily reinforced
B.
to look smarter in design
C.
to meet stricter building standards
D.
to be designed in the shape of cubes
【单选题】在Altium Designe编辑窗口中,上下移动屏幕快捷键是()。
A.
鼠标滚轮
B.
Shift+鼠标滚轮
C.
Ctrl+鼠标滚轮
D.
ALT+鼠标滚轮
【单选题】Our task is______a comprehensive plan to, meet those needs.
A.
to designing
B.
design
C.
designed
D.
to design
【单选题】The idea of public works projects as a device to prevent or control depression was designed as a means of creating job opportunities for unemployed workers and as a 'pump priming' device to aid busine...
A.
the work projects of the former were carded out by the Federal Government______
B.
the government subsidized private industry
C.
the number of unemployed was reduced
D.
the former was government's first attempt to end hardship due to unemployment
【单选题】将平面工件放在铣床工作台面上,还剩下一个轴的转动和( )个轴的移动的自由度未被限制。
A.
)二
B.
)一
C.
)三
D.
)四
【判断题】用excel求样本均值用到的函数是AVERAGE
A.
正确
B.
错误
【判断题】一个平面限制三个移动的自由度。
A.
正确
B.
错误
【单选题】The new bridge ________ by the end of last month.
A.
has been designed
B.
had been designed
C.
was designed
D.
would be designed
【简答题】People are being invited to sit down to eat with their neighbors in a nationwide lunch party designed to promote community spirit. The Big Lunch is the idea of the Eden Project in Cornwall. It aims to...
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