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简述INMARSAT-C船站的login和logout的作用?
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单选题主机遥控系统的主起动逻辑回路中,其起动准备逻辑条件包括()。 ①起动的鉴别逻辑; ②换向的鉴别逻辑; ③制动的鉴别逻辑; ④盘车机脱开; ⑤低于发火转速; ⑥滑油压力正常。A
①②⑥B
③④⑥C
②③⑤D
④⑤⑥
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单选题Chafing gear is used to().A
anchor the boatB
pick up heavy loadsC
protect fiber rope from abrasionD
strengthen mooring lines
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单选题A gas-free certificate would usually be issued by a(n)().A
ABS marine surveyorB
certified marine chemistC
port engineerD
Coast Guard marine inspector
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单选题轮机长在决定船上备件库存数量时应综合考虑的因素是()。 a.船舶技术状况; b.法定检验和船级检验的最低要求; c.船舶备件消耗规律; d.库房和备件架的容量; e.备件交货时间。A
除e其他都是B
a+bC
除d其他都是D
a~c
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单选题When a rescue vessel approaches a lifeboat in heavy seas,the person in charge of the lifeboat should().A
tie up to the rescue vesselB
transfer only those personnel who are not seasickC
wait for calmer weather before transferring personnelD
transfer all personnel immediately
考题
单选题INMARSAT通信系统船舶地球站到卫星的发射频率范围是()A
1626.5—1647.5MHzB
1530.0—1546.0MHzC
6425.0—6441.0MHzD
3600.0—3621.0MHz
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单选题当一船听到他船的雾号显示在本船正横以前,除已断定不存在碰撞危险外,船舶应当:() Ⅰ、将航速减到能维持其航向的最小速度Ⅱ、减速Ⅲ、必要时停车、倒车、把船停住A
Ⅰ、ⅢB
Ⅰ、Ⅱ、ⅢC
Ⅱ、ⅢD
Ⅰ、Ⅱ
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单选题The Inmarsat system is open for use by()countries on a non-discriminatory basis.A
someB
lots ofC
manyD
all
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单选题不符合法定检验规定的证书有效期限的是()。A
客船安全证书的有效期不超过12个月B
货船所有证书的有效期不超过5年C
免除证书的有效期限可以长于其相关证书的有效期限D
如果换证检验到期,船舶不在预定进行检验的港口,经海事局同意可给予不超过3个月的展期
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单选题The treatment of the fuel oils involves storage, heating, filtering and()A
centrifugingB
pressurizingC
atomizationD
igniting
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单选题Water lubricated tailshaft bearings wear,()A
the after one is more than forward oneB
the forward one is more than after oneC
the forward one is the same with after oneD
it depends on the type of engine
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单选题喷油器中电镀针阀与阀体磨损的部位发生在()处。A
锥面B
圆柱面C
喷孔D
A+B+C
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