单项选择题
A wave entering（）is likely to produce bores．
A.shallow water
B.deep water
C.river
D.tide
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相关考题
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单项选择题
（）is not a type of tide.
A.SEMIDIURNAL
B.DIURNAL
C.MIXED
D.OSCILLATING -
单项选择题
Water may boil up around the stern of a vessel in a channel due to（）.
A.slack water when upbound
B.shallow water
C.a cross current
D.a head current -
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
