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    It has been estimated that the earth's surface temperature has increased sone quarter to three quarters of a degree since 1850. A. to B. by C. at D. with 【查看更多】

     

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    It has been estimated(估计) that the earth's surface temperature has increased _____ sone quarter to three quarters of a degree since 1850.

    A. to　　 B. by　　 C. at　　 D. with

     

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    It has been estimated(估计) that the earth's surface temperature has increased ________ sone quarter to three quarters of a degree since 1850．

    [　　]

    A．to

    B．by

    C．at

    D．with

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