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【单选题】
根据《电能质量供电电压允许偏差》规定,10kV及以下三相供电电压允许偏差为额定电压的()。A.
±7%
B.
±5
C.
±10
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【简答题】工厂内可以加工轴类零件的主要设备有哪些? 普通卧式(数控卧式车床)万能外圆磨床
【判断题】A term for defining one particular grade of quality in one country may have quite a different meaning in another country.
A.
正确
B.
错误
【单选题】以下关于万能外圆磨床的说法正确的是（ ）。
A.
经济精度是IT7－5，Ra0.4－0.01
B.
主运动为主轴带动工件作回转运动
C.
其使用的刀具只有内圆磨头
D.
不可以加工轴肩、圆锥面和内圆柱面。
【单选题】Another term for equilibrium price is
A.
dynamic price.
B.
market-clearing price.
C.
quantity-defining price.
D.
balance price.
【单选题】Perhaps the most important defining characteristic of a human being is culture. The term culture as used here is not limited to operas, paintings, and other artistic endeavors. These are seen by anthr...
A.
The capacity for learning can only be observed in human beings.
B.
Biology plays an important role in humans’ living in a social and physical setting.
C.
Human behavior and thought do not have anything to do with culture.
D.
If there were no language communication, humans couldn’t have created the present culture.
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