单项选择题
A.No equipment is provided
B.Glue and rubber patches
C.Several various-sized sealing clamps
D.Self-adhesive rubberized canvas patches
单项选择题 Unless it is unavoidable do not jump from a place higher than 5 meters into the water． Try to minimize the shock of sudden cold immersion． When should the said caution be taken into account?（）.
单项选择题 I have lost a man overboard． Please help（）search and rescue.
单项选择题 Please（）search and rescue.