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1. SAR co-ordination communications are between the ______.A. RCC and ships in distress? ?? ? B. assisting ships and ships in distressC RCC and OSC?（现场指挥者） ?? ?? D. OSC and assisting ships2. What do the general radio communication relate to?A. management管理 of ship? ?? ?? ??? B. operation操作 of shipC. safety of ship? ?? ?? ?? ?? ???D. a, b, c are all right3. MSI is broadcast广播 via _______.A. NAVTEX? ???B. EGC? ???C. HF-telex? ???D. all of above4. The GMDSS is composed组成 of ______.A. satellite and terrestrial communication systemsB. only navigational and alerting systemsC. just MSI system and locating systemD. SAR co-ordination system5. The transmission发送 of a ______ indicates表明 that a ship is in distress and requires immediate assistance.A. urgent traffic? ???B. distress alert警报? ???C. routine traffic? ?? ?D. NAVTEX 6.IMO has decided that all ships over 300TGt must be fitted with a NAVTEX receiver ______ .A. by 01 Feb 1992? ?? ?? ?? ?? ?? ?? ?? ? B. by 01 Aug 1993C. between 01 Feb 1992 and 01 Feb 1999? ?? ? D. before 01 Feb 1992 7. The information flow流 of the MSI broadcast must be controlled ______.A. to avoid mutual interference为了避免相互干扰? ?? ?? ???B. to keep silenceC. owing to the time-share nature??D. to regulate transmitter power调节功率发射机8. The quality of EGC message is ______ affected by the position of the ship, the time of reception and climatic condition气候条件.A. sometimes? ???B. all times? ???C. never? ?? ?D. partly9. Which function is the most important one of the GMDSS.A. alerting? ?? ?? ?? ?? ?? ?? ? B. on-scene communication? ???C. safety information? ?? ?? ?? ? D. general communication10. The COSPAS-SARSAT system can provide distress alerts to the appropriate authorities相关部门______.A. anywhere in the world? ?? ? B. at sea? ?? ?C. in the air? ?? ?? ? D. ashore11.In areas covered by Inmarsat HF can be used as an ______ to satellite communications.A. alternation交替? ?B. alternate?动?? ?? ? C. alter动? ?? ? D. alternative名，替换物12.Whe