单选题The concept of television, ______ images over distances, had intrigued scientists even before the invention of moving pictures or radio.A the transmission ofB transmitted byC transmission intoD the transmitting for

题目
单选题
The concept of television, ______ images over distances, had intrigued scientists even before the invention of moving pictures or radio.
A

the transmission of

B

transmitted by

C

transmission into

D

the transmitting for

相似考题

1.I wish we had a color TV. I’m _ pictures in black and white.A.tired ofB.interested inC.fond ofD.fed up

2.Telecommunications stand for devices and systems that transmit electronic or optical signals across long distances. Telecommunications enables people around the world to contact one another, to access information instantly, and to communicate from remote areas. Telecommunications usually involves a sender of information and one or more recipients linked by a technology, such as a telephone system, that transmits information from one place to another. Telecommunications enables people to sand and receive personal messages across town, between countries, and to and from outer space. It also provides the key medium for delivering news, data, information, and entertainment.Telecommunications devices convert different types of information, such as sound and video, into electronic or optical signals. Electronic signals typically travel along a medium such as copper wire or are carried over the air as radio waves. Optical signals typically travel along a medium such as strands of glass fibers. When a signal reaches its destination, the device on the receiving end converts the signal back into an understandable message, such as sound over a telephone, moving images on a television, or words and pictures on a computer screen.Telecommunications messages can be sent in a variety of ways and by a wide range of devices. The messages can be seat from one sender to a single receiver (point-to-point) or from one sender to many receivers (point-to-multipoint). Personal communications, such as a telephone conversation between two people or a facsimile (fax) message (see Facsimile Transmission), usually involve point-to-point transmission. Point-to-multipoint telecommunications, often called broadcasts, provide the basis for commercial radio and television programming.Telecommunications begin with messages that are converted into electronic or optical signals. Some signals, such as those that carry voice or music, are created in an analog or wave format, but may be converted into a digital or mathematical format for faster and more efficient transmission. The signals are then sent over a medium to a receiver, where they are decoded back into a form. that the person receiving the message can understand. There are a variety of ways to create and decode signals, and many different ways to transmit signals.Individual people, businesses, and governments use many different types of telecommunications systems. Some systems, such as the telephone system, use a network of cables, wires, and switching stations for point-to-point communication. Other systems, such as radio and television, broadcast radio signals over the air that can be received by anyone who has a device to receive them. Some systems make use of several types of media to complete a transmission. For example, a telephone call may travel by means of copper wire, fiber-optic cable, and radio waves as the call is sent from sender to receiver. All telecommunications systems are constantly evolving as telecommunications technology improves. Many recent improvements, for example, offer high-speed broadband connections that are needed to send multimedia information over the Internet.Personal computers have pushed the limits of the telephone system as more and more complex computer messages are being sent over telephone lines, and at rapidly increasing speeds. This need for speed has encouraged the development of digital transmission technology. The growing use of personal computers for telecommunications has increased the need for innovations in fiber-optic technology.Telecommunications and information technologies are merging and converging. This means that many of the devices now associated with only one function may evolve into more versatile equipment. This convergence is already happening in various fields. Some telephones and pagers are able to store not only phone numbers but also names and personal information aboA．Current development.B．Transmission of message.C．Computer networking.D．Government regulation.

3.Television is a ______ in the transmission of message.A．senderB．receiverC．transmitting deviceD．none of the above

4.He()what he had better do.A、thought ofB、thought over

更多“单选题The concept of television, ______ images over distances, had intrigued scientists even before the invention of moving pictures or radio.A the transmission ofB transmitted byC transmission intoD the transmitting for”相关问题

  • 第1题：

    在通信专业中，TCP的英文全称是()

    A.Transmission Control Process

    B.Transfer Control Protocol

    C.Transmission Connecting Protocol

    D.Transmission Control Protocol


    正确答案：D

  • 第2题：

    With regard to Ethernet media access methods, which of the following are true?

    (Choose all that apply.)

    A．A device waits for an electronic signal before transmitting.

    B．A device listens and waits until the media is not busy before transmitting.

    C．All devices on an Ethernet segment see data that passes on the network medium.

    D．Only the sender and the receiver devices see data that passes on the network medium.

    E．Ethernet networks allow you to configured devises with higher transmission priority.


    正确答案：BC
    解析：Explanation:
    Ethernet uses the CSMA/CD access method.
    CSMA/CD logic helps prevent collisions and also defines how to act when a collision does occur. The CSMA/CD algorithm words like this:
    1. A device with a frame. to send listens until the Ethernet is not busy.
    2. When the Ethernet is not busy, the sender begins sending the frame.
    3. The sender listens to make sure that no collision occurred.
    4. Once the senders hear the collision, they each send a jamming signal, to ensure that all stations recognize the collision.
    5. After the jamming is complete, each sender randomizes a timer and waits that long.
    6 When each timer expires, the process starts over with Step 1.
    So, all devices on the Ethernet need to use CSMA/CD to avoid collisions and to recover when inadvertent collisions occur.

  • 第3题：

    Professor Smith promised to look（）my paper, that is, to read it carefully before the defence.

    • A、on
    • B、after
    • C、into
    • D、over

    正确答案:D

  • 第4题：

    What is a benefit of Internet protocol (IP) telephony?（）

    • A、Synchronizes password exchanges for call setup
    • B、Eliminates the need for physical cabling in a TCP/IP network
    • C、Enables two-way voice transmission over a packet-switched TCP/IP network
    • D、Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network

    正确答案:C

  • 第5题：

    产生彩色投影必须调整下面哪个参数（）

    • A、light的light transmission设为100%
    • B、light的light transmission设为0%
    • C、投影层的阴影层的light transmission设为80%
    • D、接受阴影层的light transmission设为100%

    正确答案:C

  • 第6题：

    Refer to the exhibit. What is the configuration an example of？（）

    • A、enabling modular QoS over Frame Relay
    • B、enabling Real-Time Transport Protocol （RTP） header compression
    • C、enabling distributed compressed Transmission Control Protocol
    • D、enabling latency and jitter reduction for Transmission Control traffic
    • E、enabling TCP header compression

    正确答案:E

  • 第7题：

    单选题
    The transmission system transmitting power from the engine to the propeller is composed of shafts, bearings, and（）
    A

    propeller

    B

    flying wheel

    C

    main engine

    D

    crankshaft


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）
    A

    The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator

    B

    The transmission is not initiated and ERROR is indicated on the display readout

    C

    The transmission will be made with default information provided automatically

    D

    The receiving station will poll the DSC unit of the vessel in distress to download the necessary information


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    If you are transmitting a distress message by radiotelephone you should（）.
    A

    use English language

    B

    always use the International Code

    C

    preface it by the word SOS

    D

    follow the transmission with the radio alarm signal


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    What should you do if you have transmitted a distress call a number of times on channel 16 and have received no reply?（）
    A

    Repeat the message using any other channel on which you might attract attention

    B

    Key the microphone several times before transmitting again

    C

    Turn up the volume on the receiver before transmitting again

    D

    Report the problem to the head electrician


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    产生彩色投影必须调整下面哪个参数（）
    A

    light的light transmission设为100%

    B

    light的light transmission设为0%

    C

    投影层的阴影层的light transmission设为80%

    D

    接受阴影层的light transmission设为100%


    正确答案： B
    解析： 暂无解析

  • 第12题：

    填空题
    Nikola Tesla invented alternating current technology that enabled electricity to be transmitted over long distances.____

    正确答案： F
    解析：
    由题干中“Nikola Tesla”定位至F段。文中讲到，Nikola Tesla发明的交流电技术使人们得以远距离地输送电力（made it possible to transmit electricity over long distances）。故匹配段落为F段。

  • 第13题：

    When most people refer to multimedia, they generally mean the combination of two or more continuous media, usually with some user(115). In practice, the two media are normally audio and video, this is,(116)plus moving(117).It should be' obvious by now that transmitting multimedia material in uncompressed form. is completely out of(118). The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission(119).

    A．display

    B．games

    C．help

    D．interaction

    E．pictures


    正确答案：D

  • 第14题：

    If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens ________．

    A.The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator

    B.The transmission is not initiated and“ERROR”is indicated on the display readout

    C.The transmission will be made with“default”information provided automatically

    D.The receiving station will poll the DSC unit of the vessel in distress to download the necessary information


    正确答案：C

  • 第15题：

    You are the network consultant from passguide.com. You have been asked for which two features of optical networks allow data to be transmitted over extremely long distances? （）

    • A、Encryption
    • B、Bandwidth limits
    • C、Minimal signal loss
    • D、No EMI

    正确答案:C,D

  • 第16题：

    Which statement best describes the application of link fragmentation and interleaving （LFI）？（）

    • A、It compresses the Layer 2 payload and marks the packet as a high priority to be transmitted first
    • B、It fragments larger packets and allows VoIP packets to be transmitted in between them.
    • C、It stops the transmission of large packets when priority packets arrive.
    • D、It sends high priority packets in between normal traffic packets.

    正确答案:B

  • 第17题：

    With regard to Ethernet media access methods, which of the following are true?（）

    • A、A device waits for an electronic signal before transmitting.
    • B、A device listens and waits until the media is not busy before transmitting.
    • C、All devices on an Ethernet segment see data that passes on the network medium.
    • D、Only the sender and the receiver devices see data that passes on the network medium.
    • E、Ethernet networks allow you to configured devises with higher transmission priority.

    正确答案:B,C

  • 第18题：

    单选题
    What is a benefit of Internet protocol (IP) telephony?（）
    A

    Synchronizes password exchanges for call setup

    B

    Eliminates the need for physical cabling in a TCP/IP network

    C

    Enables two-way voice transmission over a packet-switched TCP/IP network

    D

    Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    It is implied in the passage that ______.
    A

    many scientists had known dinoflagellate before 1988

    B

    there had been no such organisms before 1988

    C

    many scientists were in doubt about the nature of the organism in 1988

    D

    no scientists knew anything about the organism in 1988


    正确答案： B
    解析：
    推断题。第二段第二句提到1988年在北卡罗莱纳州立大学发现了这种生物时，“few scientists believed in its existence, much less in its highly unusual predatory nature.”，可知那时几乎没有科学家会相信microscopic organisms真的存在，更没有人相信它非同寻常的食肉天性（predatory nature）了。换句话说就是许多科学家对microscopic organisms的食肉天性表示怀疑，因此选项C为正确答案。

  • 第20题：

    单选题
    Refer to the exhibit. What is the configuration an example of？（）
    A

    enabling modular QoS over Frame Relay

    B

    enabling Real-Time Transport Protocol （RTP） header compression

    C

    enabling distributed compressed Transmission Control Protocol

    D

    enabling latency and jitter reduction for Transmission Control traffic

    E

    enabling TCP header compression


    正确答案： E
    解析： 暂无解析

  • 第21题：

    单选题
    Which statement best describes the application of link fragmentation and interleaving （LFI）？（）
    A

    It compresses the Layer 2 payload and marks the packet as a high priority to be transmitted first

    B

    It fragments larger packets and allows VoIP packets to be transmitted in between them.

    C

    It stops the transmission of large packets when priority packets arrive.

    D

    It sends high priority packets in between normal traffic packets.


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    Before（）,a station shall take precautions to ensure that its emission will not interfere with transmission already in progress.
    A

    transmit

    B

    to transmitting

    C

    transmitting

    D

    in transmitting


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    The concept of television, ______ images over distances, had intrigued scientists even before the invention of moving pictures or radio.
    A

    the transmission of

    B

    transmitted by

    C

    transmission into

    D

    the transmitting for


    正确答案： B
    解析：
    因为电视能远距离传输图像，所以在电影和无线电出现之前就有科学家对它产生浓厚的兴趣了。“the transmission of images” 是 “the concept of television”的同位语。

  • 第24题：

    单选题
    In NAVTEX service, VITAL warnings will（）by transmitting station.
    A

    be transmitted at once though the frequency is not clear

    B

    be transmitted as soon as the frequency is cleared coordinately

    C

    be transmitted at its scheduled transmissions

    D

    be transmitted at next scheduled transmissions


    正确答案： C
    解析： 暂无解析

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