The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.

相似题目

• The priority of EGC messages is classified by（）.

  A . distress, urgent and safety B . safety and routine C . urgent, safety and routine D . distress, urgent, safety and routine

  查看最佳答案

• Which of the following can be used in hydraulic transmission system?（）

  A . Hydraulic oil B . Animal oil C . Light oil D . Fuel oil

  查看最佳答案

• The range of a SSB transmission is MOST affected by（）.

  A . atmospheric noise and radiated power B . the frequency band selected and time of day or night C . interference and position of the moon D . radiated power and nearness to shore

  查看最佳答案

• （）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

  查看最佳答案

• The center line condition of the transmission shaft can be checked by（）

  A . the border flange’s excursion and flection B . the both end shafts line’s accordance C . the border flange’s flection and the both end shafts line’s accordance D . the border flange’s accordance and both end shafts flection degree

  查看最佳答案

• The quality of the message can be affected by（）.

  A . climate B . sunshine C . human beings D . both a and

  查看最佳答案

• 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 . resolutio

  查看最佳答案

• The transmission system is the means （）the movement of the rudder is accomplished.

  A . by which B . to which C . in which D . at which

  查看最佳答案

• One method of reducing the length of radio transmissions without distorting the meaning of your words is by using（）.

  A . slang B . secret codes C . procedure words D . analogie

  查看最佳答案

• Regarding PAR (Positive Acknowledgement and Re-transmission), which of the answer choices below are correct?（）

  A . The source device will only retransmit lost packets on the request of the destination device. B . The source device starts a timer when it sends a segment and retransmits if an acknowledgment is not received before the timer expires. C . The destination device acknowledges receipt of a segment by sending a packet with a new sequence number and the ACK bit sent. D . The destination device acknowledges receipt of a segment by sending a packet that indicates the next sequence number it expects. E . If the destination device does not receive a segment, all segments are retransmitted. F . The source device keeps a record of all segments sent and expects and acknowledgment of each.

  查看最佳答案

• When configuring the messaging system， which of the following are parameters of the e-mail transport？ （）

  A . Location B . Protocol C . Mode D . Web Address E . Host

  查看最佳答案

• The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.

  A . sometimes B . all times C . never D . partly

  查看最佳答案

• Calibration Stations give special transmissions for the calibration of ship’s（）.

  A . gyro-compass B . marine radar C . DF D . navigational satellite

  查看最佳答案

• In optical transmission systems， chirped lasers are used for the purpose of：（）.

  A . Turning the laser to a specific ITU channel B . Keeping the signal wavelength "locked" to a specific technology C . Suppressing FWM and SBS non-linear effects D . None ofthe above

  查看最佳答案

• The Beijing conveyed the message of harmony, isolation and peace.

  查看最佳答案

• The principle of concreteness means to make the message ___.

  查看最佳答案

• 214. The word ____________ indicates that the message transmission is ending.

  查看最佳答案

• TCP/IP is the Internet protocol which governs the transmission of data over the network

  查看最佳答案

• The charge for a telex is not based on the distance the message has to travel and the time spent in transmission. （）

  此题为判断题(对，错)。

  查看最佳答案

• In the trade of modern society the transmission of information plays as important a role as__________

  <img src='https://img2.soutiyun.com/ask/uploadfile/3183001-3186000/80ca83135bdee879f55784001f940915.gif' />

  查看最佳答案

• 0111The transmission system is the means ______ the movement of the rudder is accomplished.

  A.by which B.to which C.in which D.at which

  查看最佳答案

• What do scientists say about the transmission of the swine flu virus？

  A) It is easily transmitted from person to person. B) It remains unclear how it is transmitted. C) It is transmitted by sneezing or coughing. D) It is transmitted by skin-to-skin contact.

  查看最佳答案

• The disadvantage of optical fiber communication is high transmission loss. （)

  是 否

  查看最佳答案

• Order processing is the receipt and transmission of sales order information， its main tasks involve （）.

  A、order entry B、order handling C、order delivering D、order management 此题为多项选择题。

  查看最佳答案