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【多选题】
listen to D1 and choose the information about Betty. A She's Steven's classmate. B She is going to do her assignment this Saturday. C She is not very active at her leisure. D she is inviting Steven to climb some hills.A.
AShe's Steven's classmate
B.
She is going to do her assignment this Saturday.
C.
She is not very active at her leisure.
D.
she is inviting Steven to climb some hills.
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【单选题】回转体工件台阶和端面交接处用G01编程倒角,正确的是( )。
A.
）G01.X40.C-20.F
B.
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C.
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D.
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