She had just finished her homework her mother asked her to practice playing the

She had just finished her homework her mother asked her to practice playing the piano yesterday.A. wh

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4乍一看,这块手表没有什么特别之处,但实际上它是一部手机。(there be)

4 乍一看,这块手表没有什么特别之处,但实际上它是一部手机。(there be)

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What is the passage mainly about?

What is the passage mainly about?A. The changes of the author’s attitude to her mother’s English.B. T

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某企业生产甲、乙两种产品,已知生产每吨甲产品要用A原料3吨、B原料2吨;生产每吨乙产品要用A原

某企业生产甲、乙两种产品,已知生产每吨甲产品要用A原料3吨、B原料2吨;生产每吨乙产品要用A原料1吨、B原料3吨。销售每吨甲产品可获得利润5万元,每吨乙产品可获得利润3万元,该企业在一个生产周期内消耗A

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