【名词&注释】
障碍物(obstacle)、机动船(motor vessel)
[单选题]锚泊中从事疏浚作业的船舶，在白天应显示＿＿＿＿。
A. 球、菱形、球垂直三个号型
B. 可通过的一舷，垂直两个球体，存在障碍物一舷，垂直两个菱形体
C. 锚球
D. A＋C
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举一反三：
[单选题]对遇局面中所指的“在相反或接近相反的航向上相遇”包括________。
A. 一船在船首左右各5度范围内见到他船的桅灯成一直线或接近一直线
B. 一船在船首左右各半个罗经点范围内见到他船桅灯成一直线或接近一直线
C. 一船在船首左右各6度范围内见到他船的桅灯成一直线或接近一直线
D. 以上均是
[单选题]In a diesel engine, when refitting piston rings you should ①check the ring gap at the smallest diameter of the cylinder ②remove carbon from the ring groove
A. ①
B. ②
C. ①②
D. neither ① nor ②
[单选题]Which statement is True?
A. The Port State Control Officer has no right to check a SSP
B. The Master has the right to refuse the request from a Port State Control Officer to check the confidential part of the SSP on board
C. The Confidential part of a SSP can never be subject to non-flag State
D. Even the flag State has no right to check the SSP thoroughly
[单选题]当你驾驶的机动船对两船相遇局面难以断定时，你最好是________。
A. 减速
B. 停船
C. 把自己当作让路船
D. 把自己当作直航船
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