单项选择题
A.slack water when upbound B.shallow water C.a cross current D.a head current
Tropic tides are caused by the（）.A.Moon being at its ma...
单项选择题Tropic tides are caused by the（）.
A.Moon being at its maximum declination B.Moon crossing the equator C.Sun and Moon both being near 0°declination D.Moon being at perigee
To make sure of getting the full advantage of a favorab...
单项选择题To make sure of getting the full advantage of a favorable current，you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?（）
A.One hour after the predicted time B.At the predicted time C.30 minutes before flood，one hour after an ebb D.30 minutes before the predicted time
Tide is（）in direction ENE.A.gettingB.settingC.beingD.ha...
单项选择题Tide is（）in direction ENE.
A.getting B.setting C.being D.having
