正确答案: A

球、菱形、球垂直三个号型

题目：锚泊中从事疏浚作业的船舶，在白天应显示＿＿＿＿。

解析：A

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举一反三的答案和解析：

[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________。

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

①②

[单选题]Which statement is True?

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________。

减速