单项选择题
A snag or other underwater obstruction may form a（）.
A.V-shaped ripple with the point of the V pointing upstream
B.V-shaped ripple with the point of the V pointing downstream
C.small patch of smooth water on a windy day
D.smoothing out of the vessel's wake
点击查看答案&解析
相关考题
-
单项选择题
A shipmate suffers a heart attack and stops breathing. You must（）.
A.administer oxygen
B.immediately check his pulse and start CPR
C.make the victim comfortable in a bunk
D.immediately give a stimulant，by force if necesssary -
单项选择题
A shipmate chokes suddenly，cannot speak，and starts to turn blue. You should（）.
A.perform the Heimlich maneuver
B.make the victim lie down with the feet elevated to get blood to the brain
C.immediately administer CPR
D.do nothing until the victim becomes unconscious -
单项选择题
A ship must have on board a first-aid kit that is approved by the（）.
A.Minerals Management Service
B.Occupational Safety and Health Administration
C.Mine Safety and Health Administration
D.American Bureau of Shipping
