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【多选题】
零件图上的技术要求包括()。A.
表面粗糙度
B.
尺寸公差
C.
形位公差
D.
热处理及表面涂层、镀层要求
E.
零件材料
F.
零件加工、检验要求
G.
表面波纹度
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【单选题】Two or three years ago this kind of glasses _______ a favorite for some time, but now it _______.
A.
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B.
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C.
was, has gone away
D.
were, is going down
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