参考答案和解析
正确答案:A
更多“An optical disc with a 4.7GB MAX”相关问题
  • 第1题:

    What three in combination are factors that can cause four-wave mixing in fiber-optic cables? ()(Choose three.)

    A. low optical power

    B. high optical power

    C. few optical channels

    D. many optical channels

    E. low chromatic dispersion

    F. high chromatic dispersion

    G. too much power differential in the optical channels


    参考答案:B, D, E

  • 第2题:

    In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?()

    • A、the signal to noise of the current optical amplifier
    • B、the signal to noise of the previous amplifier or source
    • C、the signal to noise introduced by the optical multiplexer
    • D、the accumulated noise to signal ratio of the optical channel

    正确答案:B

  • 第3题:

    Embryonic disc


    正确答案: 即胚盘,胚盘形成于受精后的第二周,内细胞群细胞增殖分化逐渐形成由上胚层和下胚层组成的圆盘状结构,至第三周,胚盘由外胚层、中胚层和内胚层组成。胚盘将形成胎儿本体。

  • 第4题:

    OWM的英文全称是()

    • A、Optical Wavelength Multiplex
    • B、Optical wavelength Monitor
    • C、Optical wavelength Memory
    • D、All are right

    正确答案:B

  • 第5题:

    【GSM协议与标准】挂机之后A接口资源清除的顺序为(拆线-DISC,清除BSS资源-CLEAR,释放-REL):()

    • A、DISC-REL-CLEAR
    • B、REL-DISC-CLEAR
    • C、CLEAR-REL-DISC
    • D、CLEAR-DISC-REL

    正确答案:A

  • 第6题:

    Which device creates an OEO conversion? ()

    • A、 amplifier
    • B、 attenuator
    • C、 regenerator
    • D、 light emitter
    • E、 optical switch
    • F、 optical receiver
    • G、 fiber-optic cable

    正确答案:C

  • 第7题:

    SONET全称为()

    • A、synchronous optimized network
    • B、synchronous optical network
    • C、synthesis optimized network
    • D、synthesis optical network

    正确答案:B

  • 第8题:

    单选题
    In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ),  what does SNR IN represent?()
    A

     the signal to noise of the current optical amplifier

    B

     the signal to noise of the previous amplifier or source

    C

     the signal to noise introduced by the optical multiplexer

    D

     the accumulated noise to signal ratio of the optical channel


    正确答案: D
    解析: 暂无解析

  • 第9题:

    单选题
    The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no () is found in the water outlet.
    A

    water

    B

    oil

    C

    scale

    D

    ridge


    正确答案: C
    解析: 暂无解析

  • 第10题:

    单选题
    【GSM协议与标准】挂机之后A接口资源清除的顺序为(拆线-DISC,清除BSS资源-CLEAR,释放-REL):()
    A

    DISC-REL-CLEAR

    B

    REL-DISC-CLEAR

    C

    CLEAR-REL-DISC

    D

    CLEAR-DISC-REL


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    An optical disc with a 4.7GB MAXIMUM storage capacity is likely which of the followingtechnologies?()
    A

    DVD-RW

    B

    CD-RW

    C

    BD-ROM

    D

    BD-RW


    正确答案: D
    解析: 暂无解析

  • 第12题:

    单选题
    Which device creates an OEO conversion? ()
    A

     amplifier

    B

     attenuator

    C

     regenerator

    D

     light emitter

    E

     optical switch

    F

     optical receiver

    G

     fiber-optic cable


    正确答案: B
    解析: 暂无解析

  • 第13题:

    在通信专业中,PON的英文全称是“( )”,“衰减”英文通常翻译为“( ) ”。

    A.Private Optical Network B.Passive Optical Network C.Private Optical Node D.Protected Optical Node A.attenuation B.loss C.fading D.decline


    正确答案:B,A

  • 第14题:

    What three in combination are factors that can cause four-wave mixing in fiber-optic cables? ()(Choose three.)

    • A、low optical power
    • B、high optical power
    • C、few optical channels
    • D、many optical channels
    • E、low chromatic dispersion
    • F、high chromatic dispersion
    • G、too much power differential in the optical channels

    正确答案:B,D,E

  • 第15题:

    display interface pos命令输出信息Rx Optical Power、Tx Optical Power表示()。


    正确答案:发送和接收光功率

  • 第16题:

    无源光网络由哪些部分构成?()

    • A、OLT(Optical Line Terminal)-光线路终端
    • B、ONU(Optical NetworkUnit)-光网络单元
    • C、ONT(Optical Network Terminal)-光网络终端
    • D、ODN(Optical Distribution Network)-光分配网

    正确答案:A,B,C,D

  • 第17题:

    What two descriptions best define DWDM? ()

    • A、 a WDM system that is compatible with EDFA technology
    • B、 an optical technology for transmitting up to 16 channels over multiple fiber strands
    • C、 an optical technology for transmitting up to 32 channels over multiple fiber strands
    • D、 a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM
    • E、 a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM

    正确答案:A,E

  • 第18题:

    DVD光盘的最大容量是()

    • A、4.7G
    • B、9.4G
    • C、14G
    • D、17G

    正确答案:D

  • 第19题:

    名词解释题
    Embryonic disc

    正确答案: 即胚盘,胚盘形成于受精后的第二周,内细胞群细胞增殖分化逐渐形成由上胚层和下胚层组成的圆盘状结构,至第三周,胚盘由外胚层、中胚层和内胚层组成。胚盘将形成胎儿本体。
    解析: 暂无解析

  • 第20题:

    单选题
    The () of the gravity disc is too big It causes oil to flow through the water outletWe changed the disc and no oil is found in the water outlet.
    A

    gravity

    B

    diameter

    C

    circumference

    D

    cylinder


    正确答案: A
    解析: 暂无解析

  • 第21题:

    多选题
    What three in combination are factors that can cause four-wave mixing in fiber-optic cables?()
    A

    low optical powe

    B

    high optical power

    C

    few optical channels

    D

    many optical channels

    E

    low chromatic dispersion

    F

    high chromatic dispersion

    G

    too much power differential in the optical channels


    正确答案: D,B
    解析: 暂无解析

  • 第22题:

    多选题
    What two descriptions best define DWDM? ()
    A

    a WDM system that is compatible with EDFA technology

    B

    an optical technology for transmitting up to 16 channels over multiple fiber strands

    C

    an optical technology for transmitting up to 32 channels over multiple fiber strands

    D

    a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM

    E

    a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM


    正确答案: D,A
    解析: 暂无解析

  • 第23题:

    多选题
    What three in combination are factors that can cause four-wave mixing in fiber-optic cables? ()(Choose three.)
    A

    low optical power

    B

    high optical power

    C

    few optical channels

    D

    many optical channels

    E

    low chromatic dispersion

    F

    high chromatic dispersion

    G

    too much power differential in the optical channels


    正确答案: A,B
    解析: 暂无解析