单项选择题
A.pitching
B.rolling
C.heaving
D.swaying
单项选择题 That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the().
单项选择题 Point Judith Harbor of Refuge().
单项选择题 One method of controlling rats on vessels is by rat-proofing. Rat-proofing is accomplished by ().