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图中:A=24, B=20, C=80, D=8, E=19 请问模型体积为 〔 〕 ? 图中:A=30, B=24, C=80, D=10, E=16 请问模型体积为〔 〕?
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举一反三
【单选题】有一铜棒外圆精度为IT6，表面粗糙度要求Ra＝0.8，则合理的加工路线为（）。
A.
粗车－半精车－精车
B.
粗车－半精车－粗磨－精磨
C.
粗车－半精车－精车－金刚石车
D.
粗车－半精车－精车－磨－研磨
【单选题】Section C Passage One Questions 16 to 18 are based on the passage you have just heard. 16.
A.
There are mysterious stories behind his works.
B.
There are many misunderstandings about him.
C.
His works have no match worldwide.
D.
His personal history is little known.
【单选题】有一铜棒外圆精度为IT6,表面粗糙度要求Ra=0.8um,则合理的加工路线为( )。
A.
粗车－半精车－精车
B.
粗车－半精车－粗磨－精磨
C.
粗车－半精车－精车－金刚石车
D.
粗车－半精车－精车－磨－研磨
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