单项选择题

Which of the following is not an operation mode of AIS?（）

A.A ship-to-ship mode
B.A ship-to-shore mode
C.Integrated with a vessel traffic system
D.Sending out information through broadcast automatically

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单项选择题
（）is where the crew eat their meals.

A.The funnel
B.The messroom
C.The galley
D.The satellite antenna
单项选择题
When the wave period and the apparent rolling period are the same（）.

A.synchronous rolling occurs
B.roll period decreases
C.roll period increases
D.roll amplitude is dampened
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