have lows lower than normal and highs higher than normal
have lows higher than normal and highs lower than normal
are unpredictable
occur in the spring of the year
第1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2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3题：
In this article, the writer mainly wants to tell the readers______.
A. that the universe is so large that we cannot imagine it
B. where the planets in the universe came from
C. how the high mountains were formed on the sun
D. why the tides over the surface of the sun were so powerful
50．答案为B 从全文整体来看，主要讲述的是行星的形成过程，因此选B。
第4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5题：
The datum from which the predicted heights of tides are reckoned in the tide tables is ______.
A.mean low water
B.the same as that used for the charts of the locality
C.the highest possible level
D.given in table three of the tide tables
第6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7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8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9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10题：
Of the following，______ is not likely found in The Mariners Handbook（NP100）．
A.navigational hazards and buoyage，meteorological data，details of pilotage，regulations，port facilities and guides to major port entry
B.information on charts
C.information on operational information and regulation
D.information on tides，currents and characteristics of the sea