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單項(xiàng)選擇題

There are often three parts in a weather report, not including（）

A.warning
B.general synopsis
C.forecast
D.traffic density

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單項(xiàng)選擇題

Which of the following is defined as static information of AIS?（）

A.Navigational status
B.Safety related messages
C.MMSI
D.Route plan

單項(xiàng)選擇題

When hitting a solid object such as ship or an airplane,the radar waves are reflected back（）they came.

A.in the way
B.the way
C.by the way
D.through the path

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