单选题The two most effective generating forces of surface ocean currents are（）.Atemperature and salinity differences in the waterBwind and density differences in the waterCwater depth and underwater topographyDrotation of the Earth and continental interference
单选题
The two most effective generating forces of surface ocean currents are（）.
A
temperature and salinity differences in the water
B
wind and density differences in the water
C
water depth and underwater topography
D
rotation of the Earth and continental interference
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