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为什么国家提倡成立船舶管理公司?
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φ由1,0.5,0到负值B
φ由0,0.5,1到负值C
φ由负值,0,0<φ<1到1D
φ由0,0.2,0.5到1
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a restricted air intakeB
a clogged connecting rod oil passageC
incorrect connecting rod alignmentD
high cylinder firing temperatures
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Ⅰ+ⅢB
Ⅰ~ⅣC
Ⅰ+Ⅱ+ⅢD
Ⅰ+Ⅲ+Ⅳ
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small thanB
more thanC
little thanD
less than
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减小,减小B
减小,增大C
增大,减小D
增大,增大
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Ship security officerB
Company security officerC
Port facility security officerD
PSC officer
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单选题The difference between the heights of low and high tide is the().A
periodB
rangeC
distanceD
depth
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in all parts of the worldB
in some parts of the worldC
from all corners of the worldD
from every corner of the world
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单选题下列说法正确的是:() Ⅰ、机动船一旦进入能见度不良的水域就必须备车航行; Ⅱ、船舶在能见度不良的水域中相互看不见时才须鸣放雾号; Ⅲ、船舶在能见度不良的水域中保持正规了望指的就是进行雷达标绘; Ⅳ、机动船一旦进入雾区就应减速航行; Ⅴ、雾中船舶应尽量避免在狭水道内锚泊A
Ⅰ~ⅤB
Ⅰ、Ⅲ、ⅤC
Ⅰ、ⅤD
Ⅰ、Ⅳ、Ⅴ
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a+b+cB
b+c+dC
a+b+dD
a+c+d
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indicates the engine's particularsB
tells the engine's functionC
shows the engine's typeD
refers to the engine's information
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L<7米机动船B
从事维修航标的船C
疏浚船正在进行疏浚作业D
B、C都是
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