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    9．It was in Japan that the atomic weapon was used in 1945, and the power increased enormously ever since . A．is B．has been C．was D．had been 【查看更多】

     

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    It was in Japan that the atomic weapon was used in 1945, and the power ____increased enormously ever since .

           A．is        B．has been        C．was       D．had been

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