单项选择题
The direction in which a vessel is steered is the course. The path actually followed is the （）.
A.route B.track C.heading D.course over the ground
单项选择题 The direction a vessel is pointed at any given time is the（）.
单项选择题 The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.
单项选择题 The dew point is reached when the（）.
