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

题目
单选题
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

更多“单选题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：

    Bluetooth is a （）technology.

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

    正确答案:D

  • 第3题：

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


    正确答案:RFID

  • 第4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5题：

    单选题
    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： 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
    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11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12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

  • 第13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：

    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16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
    Horton Point Light（）.
    A

    is 14 feet above sea level

    B

    has a fixed green light

    C

    is shown from a white square tower

    D

    is synchronized with a radio beacon


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    Radio beacon service of John Light（）discontinued.
    A

    has been

    B

    have been

    C

    have

    D

    has


    正确答案： C
    解析： 暂无解析

  • 第23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24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

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