A.dike
B.revetment
C.cutoff
D.crib
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A.directional current
B.forward current
C.propeller current
D.wake current
最新試題
The steady current circling the globe at about 60°S is the（）.
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
The type of current which will have the greatest effect on the course made good for your vessel is（）.
The winds with the greatest effect on the set，drift，and depth of the equatorial currents are the（）.
Stand of the tide is that time when（）.
Tropic tides are caused by the（）.
The set of the current is the（）.
Neap tides occur（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
The term flood current refers to that time when the water（）.