某工件的三视图如图3所示,现将该工件通过切割,加工成一个体积

某工件的三视图如图3所示,现将该工件通过切割,加工成一个体积尽可能大的长方体新工件,并使新工件的一个面落在原工件的一个面内,则原工件材料的利用率为(材料利用率=)(    

A.     B.      C.       D.

答案

A.

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