A.harmonic constant
B.establishment of the port
C.half-tide level
D.tide cycle
您可能感興趣的試卷
你可能感興趣的試題
A.North
B.South
C.East
D.West
A.stem the current and make very slow headway when the anchor is dropped
B.stem the current and be falling aft very slowly when the anchor is dropped
C.stem the current and endeavor to make neither headway nor sternway when the anchor is dropped
D.stop all headway through the water and keep the current astern when the anchor is dropped
A.period
B.range
C.distance
D.depth
A.by
B.with
C.on
D.in
A.Northwesterly
B.Southwesterly
C.Southerly
D.Northerly
最新試題
Which statement is TRUE concerning equatorial tides（）.
Neap tides occur when the（）.
A wave entering（）is likely to produce bores．
Priming of the tides occurs（）.
River currents tend to（）.
The set of the current is the（）.
The tide（）.It’s 2 hours before low water，and（）your present position you will be aground at low water.
You are anchoring in a river where the current is from one direction only.The best way to lay out two anchors is to have them（）.
The two most effective generating forces of surface ocean currents are（）.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.