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    1．Which of the following does a paper burn in? A．CO2 B．N2 C．O2 D．H2 【查看更多】

     

    题目列表(包括答案和解析)

    Which of the following does paper burn in?

    A．CO2              B．N2                C．O2                 D．H2O

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    Which of the following does paper burn in?

    [　　]

    A．CO2

    B．N2

    C．He

    D．O2

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    Which of the following does paper burn in?

    [　　]

    A．CO2
    B．N2
    C．O2
    D．He

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    Which of the following does paper burn in?

    [　　]

    A．CO2
    B．N2
    C．O2
    D．H2

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