航海英语海洋学基本知识单项选择题每日一练(2017.11.19)

单项选择题
A current perpendicular to a vessel’s track has the greatest effect on the vessel’s course made good（）.
A.at high vessel speeds
B.at low vessel speeds
C.in shallow water
D.in deep water
单项选择题
The direction of the southeast trade winds is a result of the（）.
A.equatorial current
B.humidity
C.rotation of the earth
D.change of seasons
单项选择题
A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.
A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
单项选择题
Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the（）.
A.Alaska Current
B.Subarctic Current
C.Kuroshio Current
D.Oyashio Current
单项选择题
The cold ocean current which meets the warm Gulf Stream between latitudes 40°and 43°N to form the cold wall is called the（）.
A.North Cape Current
B.Labrador Current
C.Greenland Current
D.North Atlantic Current