He has ________ on his farm.A.20 head of cattlesB.

He has ________ on his farm.A.20 head of cattlesB.20 heads of cattlesC.20 hea

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The boy is not happy at the new school. He has ___

The boy is not happy at the new school. He has ________ friends there.A. few

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下列不受著作权法保护的是( D )

下列不受著作权法保护的是( D )

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如果申请文件是邮寄的,则专利申请日是( B )

如果申请文件是邮寄的,则专利申请日是( B )

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美术作品原件的所有权与美术作品的著作权( A )。

美术作品原件的所有权与美术作品的著作权( A )。

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