A.at a new or full Moon
B.when the Sun，Moon，and Earth are in line
C.at approximately 28-day intervals
D.when the Moon is at quadrature
您可能感興趣的試卷
你可能感興趣的試題
A.at the start of spring，when the Sun is nearly over the equator
B.only when the Sun and Moon are on the same sides of the Earth and are nearly in line
C.when the Sun and Moon are at approximately 90°to each other，as seen from the Earth
D.when the Sun，Moon，and Earth are nearly in line，regardless of alignment order
A.January
B.April
C.August
D.October
A.Effect of the moon's gravity
B.Fetch
C.Wind velocity
D.Length of time a wind has been blowing
A.adverse currents for practically the entire crossing
B.favorable currents for practically the entire crossing
C.favorable currents in the summer months and adverse currents in the winter months
D.variable currents having no significant effect on the total steaming time
A.vary
B.variable
C.variably
D.variability
最新試題
Stand of the tide is that time when（）.
The speed of an ocean current is dependent on（）.
（）is not a type of tide.
The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.
The velocity of the current in large coastal harbors is（）.
You are docking a vessel．Wind and current are most favorable when they are（）.
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
Priming of the tides occurs（）.
The type of current which will have the greatest effect on the course made good for your vessel is（）.
A wave entering（）is likely to produce bores．