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【简答题】
试简述数控加工夹具的特点。
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皮皮学刷刷变学霸
举一反三
【简答题】在蜗杆传动中，蜗轮的螺旋线方向应与蜗杆的螺旋线方向（）。
【单选题】In a survey of Americans who had used an online dating service, approximately _____ said that they had had a positive experience.
A.
one-quarter
B.
one-third
C.
one-half
【简答题】在蜗杆传动中,蜗轮的螺旋线方向应与蜗杆的螺旋线方向 ( ) 。
【单选题】I see from your resume that you've had a lot of experience in sales. ( )
A.
Yeah. I am sure this furniture will sell very well in this neighborhood.
B.
Well. I worked as a teacher. a nurse , a doctor and a lawyer In the last five years.
C.
Yes , my parents have a store. I used to work there after school.
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