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【单选题】
把钢件加热到临界温度以上,经适当保温,然后在空气中冷却的一种工艺称为( )。A.
正火
B.
回火
C.
退火
D.
淬火
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反馈参考答案：
举一反三
【简答题】某纯气体A2解离吸附
【判断题】The traditional Chinese painting is quite different from the Western painting in many respects.
A.
正确
B.
错误
【单选题】Painting in oil is harder than______.
A.
water colours
B.
in water colours
C.
paint in water colours
D.
painting in water colours
【单选题】对于电池Zn(s)︱Zn2+(a1)‖Cu2+ (a2)︱Cu(s),当
A.
a2=常数时，a1增大，E也增大
B.
a1=常数时，a2增大，E减小
C.
a2增大，a1减小时，E增大
D.
a2增大，a1减小时，E减小
【简答题】The Importance of Painting in Preschool Painting is a big part of the little dreamers’life. Painting is much more than a activity. For different types of children, painting is a good way to exp...
【单选题】Painting in oil is harder than _________.
A.
water colors
B.
in water colors
C.
paint in water colors
D.
painting in water color
【多选题】Description is painting in words of ( )
A.
a person
B.
a place
C.
an object
D.
a scene
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