单项选择题
The speed of an ocean current is dependent on（）.
A.the density of the water B.the air temperature C.the presence of a high pressure area near it D.underwater soil conditions
单项选择题 The set of the ocean current is caused by（）.
单项选择题 The set of the equatorial countercurrent is generally to the（）.
单项选择题 The set of the current is the（）.
