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    22．Lawrence Craven, a doctor from the USA.is the author of several published reports, one of introduced the idea in 1953 aspirin could reduce the risk of heart attacks． A．them; when B．which; that C．what; that D．which; when 【查看更多】

     

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    22．Lawrence Craven, a doctor from the USA，is the author of several published reports, one of______ introduced the idea in 1953 ______aspirin could reduce the risk of heart attacks．

           A．them; when          B．which; that     C．what; that       D．which; when

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    Lawrence Craven, a doctor from the USA，is the author of several published reports, one of______ introduced the idea in 1953 ______aspirin could reduce the risk of heart attacks．

    　 A．them; when　 　　　　　　　 B．which; that 　　　　　 C．what; that 　 D．which; when

     

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