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【多选题】
夹具对刀元件的作用是确定( )对( )的正确加工位置。A.
刀具
B.
夹具
C.
工件
D.
机床
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反馈参考答案：
举一反三
【单选题】UK Gross Domestic Product (in contrast to Gross National Product) measures the production and income of
A.
British-owned firms no matter where they are located in the world
B.
none of these answers
C.
the domestic service sector only
D.
people and factories located within the borders of the UK
【简答题】国内生产总值(gross domestic product)
【简答题】40×20的积的末尾有______个0，60×50的积的末尾有______个0．
【单选题】____ refers to the sum of the gross domestic product of all countries.
A.
net world product
B.
world net income
C.
gross world product
D.
gross world income
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