When the transmissions of a radio station or a Decca chain, etc., have broken down, switch off or suspended, it is ______.A.UnfunctionalB.Break downC.Off powerD.Off air

题目

When the transmissions of a radio station or a Decca chain, etc., have broken down, switch off or suspended, it is ______.

A.Unfunctional

B.Break down

C.Off power

D.Off air

相似考题

1.●In recent years，TCP／IP has also begun to be used by telephone companies to provide faster,cheaper telephone (74) .(74) A．transmittingB．transmitedC．transfersD．transmissions

2.What a waste! Why do you () the water () all the time ?A、have…flowingB、have…flowC、have…to flowD、have…flowed

3.In recent years, TCP/IP has also begun to be used by telephone companies to provide faster, cheaper telephone(67)A．transmittingB．transmitedC．transfersD．transmissions

4.What’s ____ in the bone will come out in the flesh.A、bredB、insertedC、raisedD、broken

参考答案和解析
正确答案：D
当无线电台发射或台卡链已经故障，关机或暂停，这叫Offair。
更多“When the transmissions of a radio station or a Decca chain, etc., have broken down, switch ”相关问题

  • 第1题：

    In recent years,TCP/1P has also begun to be used by telephone companies to provide faster, cheaper telephone(74)

    A．transmitting

    B．transmited

    C．transfers

    D．transmissions


    正确答案：D
    解析：最近几年，TCP/IP已经被电信公司使用为用户提供更快速、更廉价的电话通信。

  • 第2题：

    SGSN中STATION_C与STATION_D对于SS7的处理是主备份形式的。()

    A．错误

    B．正确


    参考答案：A

  • 第3题：


    A. discarded
    B. abandoned
    C. reserved
    D. broken

    答案：C
    解析：

  • 第4题：

    SGSN中STATION_C与STATION_D对于PDU的处理是主备份形式的。()

    A．错误

    B．正确


    参考答案：A

  • 第5题：

    What may NOT be used when securing heavy vehicles aboard Ro-Ro vessels ________．

    A.Chain lever

    B.Turnbuckle

    C.Webbing

    D.Chain


    正确答案：C

  • 第6题：

    以下哪个标签实现了switch功能（）。

    A．＜c:if＞

    B．＜c:switch＞

    C．＜c:choose＞与＜c:when＞

    D．＜c:case＞


    ＜c:choose＞

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