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    When we are doing an experiment, we usually spend two hours with a short in the middle. A. break B. resting C. breaking D. broken 【查看更多】

     

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     When we are doing an experiment, we usually spend two hours with a short ______ in the 

       middle.  

        A. break                   B. resting                  C. breaking                       D. broken

    查看答案和解析>>

     When we are doing an experiment, we usually spend two hours with a short ______ in the 

       middle.  

        A. break                   B. resting                  C. breaking                       D. broken

    查看答案和解析>>


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