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    A satellite is ________ object traveling in ________ orbit round another object in ________ space．

    [　　]

    A．the;/; the

    B．an; an; a

    C．the; an; a

    D．an; an;/

    答案：D
    解析：

    本题考查冠词的用法，in space“在太空中”，space前不加冠词；object与orbit是指类别，故用an。


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