A.Low cl;ouds
B.High clouds
C.Special clouds
D.medium clouds
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A.Cirrostratus
B.Cirrus
C.Cirrocumulus
D.Altostratus
A.Cirrostratus
B.Cirrus
C.Cirrocmulus
D.Altostratus
A.Tides
B.Sea
C.Swell
D.Wind
A.Falling barometric pressure
B.Rising barometric pressure
C.The circulations of winds
D.The change of wind direction
A.The persence of cirrus clouds
B.The low-hanging stratus clouds
C.The altocumulus clouds
D.The massive cumulus clouds
最新試題
Which of the following shall not the officers in charge of the navigational watch do?（）
Which of the following is not a form of precipitation?（）
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
Bales close to the deckhead should be covered to prevent（）.
Full details of all lights and fog signals are shown on（）.
What is it called when it is possible to ignite the vapour above the oil?（）
When the wave period and the apparent rolling period are the same（）.
Manoeuvring information can not be obtained from（）.
Fog is likely to occur when there is little difference between the dew point and the（）.
Before any loading takes place any signs of the previous cargo should do（）.