單項(xiàng)選擇題（）reters to be amount of water vapour in the air.
A.Humidity
B.Temperature
C.Precipitation
D.Wind
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1.單項(xiàng)選擇題（）is used for receiving maritime safety information which is automatically printed by the receiver.
A.NAVETEX receiver
B.Search and Rescue Transponder
C.Emergency Position Indicating Radio Beacon
D.Digital selective calling
2.單項(xiàng)選擇題（）is used for providing homing signals from survival craft for detection by 9Ghzradar.
A.NAVETEX receiver
B.Search and Rescue Transponder
C.Emergency Position Indicating Radio Beacon
D.Digital selective calling
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The dew point temperature is（）.
題型：?jiǎn)雾?xiàng)選擇題
Fog is likely to occur when there is little difference between the dew point and the（）.
題型：?jiǎn)雾?xiàng)選擇題
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
題型：?jiǎn)雾?xiàng)選擇題
Which of the following is not an operation mode of AIS?（）
題型：?jiǎn)雾?xiàng)選擇題
The circulation around a low pressure center in the Northern Hemisphere is（）.
題型：?jiǎn)雾?xiàng)選擇題