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    27．Some plants can take in carbon dioxide we breathe out and give oxygen to us . A．in case B．in turn C．in return D．in addition 【查看更多】

     

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    Some plants can take in carbon dioxide(二氧化碳)we breathe out and give ________ oxygen to us.

    [　　]

    A．in case
    B．in turn
    C．in return
    D．in addition

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    Some plants can take in carbon dioxide（二氧化碳）we breathe out and give ________ oxygen to us.

    　　A．in case

    　　B．in turn

    　　C．in return

    　　D．in addition

     

    查看答案和解析>>

    Some plants can take in carbon dioxide（二氧化碳）we breathe out and give ________ oxygen to us.

    　　A．in case

    　　B．in turn

    　　C．in return

    　　D．in addition

     

    查看答案和解析>>


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