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The signals that will be used for emergency should be clearly （）（列出）.
- A、put out
- B、set out
- C、set on
- D、put on
参考答案
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单选题When whistle signals are used for launching lifeboats，one short blast means（）.A
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单选题Which of the following statements is TRUE regarding automatic identification systems (AIS) ? （）A
AIS may be used to make passing arrangements via ship-to-ship text messaging thus relieving a vessel operator from sounding whistle signals or making contact via radiotelephoneB
AIS may be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is still required to sound whistle signals unless the arrangement is made via radiotelephoneC
AIS cannot be used to make passing arrangements because the system does not have the ability to communicate from ship-to-ship in this mannerD
AIS cannot be used to make passing arrangements because the use of the ship-to-ship text messaging feature in this way is prohibited
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单选题What is the difference between 1+1 and 1：1 protection switching？（）A
1+1 is based on APS， while 1：1 is based on IPS.B
1：1 is used in SNCP switching， while 1+1 is used in MS-SPRing switching.C
1+1 sends signals on Working and Protect paths， while 1：1 sends signals only on Working path.D
1+1 sends signals on Working path ONLY， while 1：1 sends signals on both Working and Protect paths.
考题
单选题The signals that will be used for emergency should be clearly （）（列出）.A
put outB
set outC
set onD
put on
考题
单选题What is the difference between a CSU/DSU and a modem？（）A
A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.B
A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.C
A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.D
A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
考题
单选题Which statement concerning locating signals in the GMDSS is FALSE（）.A
Locating signals are transmitted by survival craft VHF transceiversB
Locating signals are transmitted by SARTsC
Locating signals are intended to facilitate the finding of a distressed vessel or its survivorsD
Locating signals are not transmitted by autoalarm generators
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