A.only one high and one low water occur during a lunar day
B.the high tide is higher and the low tide is lower than usual
C.the high tide and low tide are exactly six hours apart
D.two high tides occur during a lunar day
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In most cases，the direction of the apparent wind lies between the bow and（）.
The direction of the surface wind is（）.
Ocean currents are well defined and（）.
Advection fog holds longest over which portions of the lakes?（）
The largest waves (heaviest chop) will usually develop where the wind blows（）.
The cold ocean current which meets the warm Gulf Stream between latitudes 40°and 43°N to form the cold wall is called the（）.
In the Northern Hemisphere，your vessel is believed to be in the direct path of a hurricane，and plenty of sea room is available. The best course of action is to bring the wind on the（）.
The drift and set of tidal，river，and ocean currents refer to the（）.
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）.
In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n)（）.