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

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更多“The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.”相关的问题

第1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

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第2题

[单选题] （）conveys a signal of desired rudder angle from the bridge and activates the power unit and transmission system unit the desired angle is reached.

A、The control equipment B、The power unit C、The transmission system D、The follow-up mechanism

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第3题

[判断题] When deployed to transmission application of wavelengths up to 160 wavelengths, the ZXWM M900 performs optical amplification of signals at the C band and the L band independently at the same time.

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第4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

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第5题

[多选题] Which of the following statements regarding ISDN are correct?（）

A、Each ISDN B channel has transmission speeds of up to 64 kbps. B、The ISDN B channel can carry video, voice or data. C、The ISDN B channel transmission rate varies depending on the service used. D、The ISDN D channel transmits control information. E、The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.

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第6题

[单选题] The in the steering gear move the rudder to the required angel（）

A、control equipment B、power unit C、transmission mechanisms D、fittings and pipeline

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第7题

[填空题] if the single-channel transmission rate of a WDM system goes up to 2.5G or above, the phenomenon of （）will take place.

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第8题

[] I wonder if Tim could control the situation. （）

A、A.It‘s none of your business. B、B.You‘ll get involved in it. C、C.Tim must be thinking about it. D、D.Well, if he can‘t control it, no one can.

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