Which product has been the most successful？A．B．C．

What can we learn from the woman？A．She has been to most interesting places in Europe.B．She

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Why have there been difficulties with the machinery for the new product？A．It has been nece

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Which of the petroleum products listed has the lowest flash point？A.Hydraulic oilB.Lubrica

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According to the news, what has happened last autumn？A．A rocket has been successfully laun

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Which of the following has the largest increase in production over the past decade？A．natur

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A______division of labor has contributed most to the increase of production, promoted gene

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Generally speaking a successful salesman has to talk to several regularly in order to sell the products.()

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