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    33．Several minutes after its launch, the X-37B plane successfully sent back its first to the control center. A．mark B．sign C．instruction D．signal 【查看更多】

     

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    Several minutes after its launch, the X-37B plane successfully sent back its first ________ to the control center．


    1. A.
      mark
    2. B.
      sign
    3. C.
      instruction
    4. D.
      signal

    查看答案和解析>>

    Several minutes after its launch, the X-37B plane successfully sent back its first___________to the control center.

           A．mark B．sign   C．instruction       D．signal

    查看答案和解析>>


    Several minutes after its launch, the X-37B plane successfully sent back its first___________to the control center.

    A．markB．signC．instructionD．signal

    查看答案和解析>>

    Several minutes after its launch, the X-37B plane successfully sent back its first ________ to the control center．

    [　　]
    A．

    mark

    B．

    sign

    C．

    instruction

    D．

    signal

    查看答案和解析>>


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