At the start of spring，when the Sun is nearly over the equator
Only when the Sun and Moon are on the same sides of the Earth and are nearly in line
When the Sun and Moon are at approximately 90° to each other，as seen from the Earth
When the Sun，Moon，and Earth are nearly in line，regardless of alignment order
第1题：
Above-normal tides near the center of a hurricane maybe caused by the ______.
A.high barometric pressure
B.jet stream
C.storm surge
D.torrential rains
第2题：
As soon as the ship is berthed，you should lower the gangway，stretch a net ______ it，and adjust it to the rise and fall of the tides so that personnel may embark or disembark in safety．
A.over
B.besides
C.near
D.underneath
第3题：
Neap tides occur ______.
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
第4题：
Tides are superimposed on nontidal rising and falling water levels，caused by ______．
A.freshets
B.floods
C.river flows
D.seismic events
第5题：
______ offers a detailed description of tidal theory and its application to the analysis and prediction of tides and tidal streams．
A.Ocean Passages for the World（NP136）
B.Admiralty Tidal Stream Atlases
C.Admiralty Manual of Tides（NP120）
D.Admiralty Tidal Handbooks（NP122 1-3）
第6题：
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the ______.
A.air gap
B.freeboard
C.penetration
D.water depth
第7题：
Mean low water is the average height of ______.
A.the surface of the sea
B.high waters and low waters
C.all low waters
D.the lower of the two daily low tides
第8题：
Spring tides occur______．
A.when the moon is new or full
B.when the moon and sun have declination of the same name
C.only when the moon and sun are on the same sides of the earth
D.at the beginning of spring when the sun is over the equator
第9题：
Which statement is TRUE concerning equatorial tides ________．
A.They occur when the Sun is at minimum declination north or south
B.They occur when the Moon is at maximum declination north or south
C.The difference in height between consecutive high or low tides is at a minimum
D.They are used as the basis for the vulgar establishment of the port
第10题：
大潮（spring tide）与小潮（neap tide）