Bluetooth is a （）technology.A、SatelliteB、MicrowaveC、Light waveD、Radio Frequency

题目

Bluetooth is a （）technology.

  • A、Satellite
  • B、Microwave
  • C、Light wave
  • D、Radio Frequency
相似考题

1.RFID(Radio Frequency Identification),即射频识别,俗称电子标签。()此题为判断题(对，错)。

2.Whichofthefollowingcommunicationmethodswillprovidethemaximumbandwidthforvideostreamingthroughamediaextender?()A.100BaseTEthernetB.802.11gC.Z-WaveD.Bluetooth

3.Bluetooth is a ()technology.A. SatelliteB. MicrowaveC. Light waveD. Radio Frequency

4.The speed of radio waves is equal to ________of light.A. thoseB. thatC. the oneD. the ones

参考答案和解析
正确答案:D
更多“Bluetooth is a （）technology.A、SatelliteB、MicrowaveC、Light waveD、Radio Frequency”相关问题

  • 第1题：

    无线电波传输标志.RF的英文全称式()

    A.Radio Wave

    B.Radio Flag

    C.Raddio Fdrequency

    D.Red Frequency


    参考答案：C

  • 第2题：

    If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on ?______.

    A.Calling frequency

    B.Distress frequency

    C.Urgency frequency

    D.Working frequency


    正确答案：D
    如果你知道你船在甚高频上呼叫保持工作和职守频率，你将呼叫哪个频率？工作频率。

  • 第3题：

    射频识别技术RFID(Radio Frequency Identification)是20世纪90年代开始兴起的一种自动识别技术。


    正确答案:正确

  • 第4题：

    Which of the following communication methods will provide the maximum bandwidth for video streaming through a media extender？（）

    • A、100BaseT Ethernet
    • B、802.11g
    • C、Z-Wave
    • D、Bluetooth

    正确答案:A

  • 第5题：

    单选题
    If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）
    A

    Calling frequency

    B

    Distress frequency

    C

    Urgency frequency

    D

    Working frequency


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    Bluetooth is a （）technology.
    A

    Satellite

    B

    Microwave

    C

    Light wave

    D

    Radio Frequency


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）
    A

    After determining that the frequency or channel appears to be no longer in use

    B

    After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications

    C

    After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded

    D

    Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which value is NOT supported by Cisco Spectrum Expert， when checking for RF coverage？（）
    A

    Access point received-signal strength level

    B

    Spectrum utilization

    C

    Client data rate

    D

    In-band radio frequency interference


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
    A

    persistence

    B

    pulse repetition rate

    C

    pulse length

    D

    resolution


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    （） is (are) not power supplied by main switchboard directly.
    A

    Steering gear and windlass

    B

    Navigation light and radio power panel

    C

    Navigation device power box

    D

    Daily fresh water pump


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    What is the fundamental purpose for imposing radio silence? （）
    A

    To ensure that interference to proprietary communications is minimized

    B

    To ensure that only voice communications can be effected on the distress frequency or channel

    C

    To ensure that a distressed vessel will have a window twice each hour for transmitting routine messages

    D

    To ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    How is “radio silence” imposed?（）
    A

    By the On Scene Coordinator (OSC)

    B

    By the Coast Earth Station (CES) controlling the distress communications on that frequency

    C

    It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channel

    D

    It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel


    正确答案： A
    解析： 暂无解析

  • 第13题：

    What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received ________．

    A.No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency

    B.The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received

    C.The Operator should immediately set continuous watch on VHF channel 70

    D.The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received


    正确答案：B

  • 第14题：

    射频识别（Radio Frequency Identification，RFID）技术的基本原理是磁波理论。


    正确答案:错误

  • 第15题：

    射频识别技术的英文全称是Radio Frequency Identification缩写（）


    正确答案:RFID

  • 第16题：

    单选题
    When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.
    A

    a distinctive signal

    B

    the Morse Code signal for SOS

    C

    a computerized voice announcement of Mayday

    D

    your vessel's International Radio Call Sign


    正确答案： A
    解析： 暂无解析

  • 第17题：

    判断题
    射频识别（Radio Frequency Identification，RFID）技术的基本原理是磁波理论。
    A

    对

    B

    错


    正确答案： 错
    解析： 暂无解析

  • 第18题：

    填空题
    射频识别技术的英文全称是Radio Frequency Identification缩写（）

    正确答案： RFID
    解析： 暂无解析

  • 第19题：

    单选题
    Details of coast radio stations and radar stations can be found in（）.
    A

    Admiralty Chart

    B

    Admiralty Light list

    C

    Admiralty List of Radio Signals

    D

    Admiralty Notices to Mariners


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Whenever your marine radio is on，FCC Rules require you to monitor（）.
    A

    a commercial ship-to-ship channel

    B

    the last frequency that was used

    C

    the distress and calling frequency

    D

    the radio only if expecting a call


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    A flashing light is a light that（）.
    A

    flashes at regular intervals at a frequency of 120 flashes or more per minute

    B

    is yellow in color

    C

    is visible over an arc of the horizon of not less than 180°nor more than 225°

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第22题：

    判断题
    Radio Frequency Identification即是射频识别技术，是一种接触式通讯自动识别技术
    A

    对

    B

    错


    正确答案： 对
    解析： 暂无解析

  • 第23题：

    单选题
    When can routine communications be resumed when radio silence has been imposed?（）
    A

    After determining that the frequency or channel appears to be no longer in use

    B

    After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications

    C

    Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded

    D

    If，in the Master's opinion，communications on that frequency will interfere with emergency communications


    正确答案： B
    解析： 暂无解析

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