单项选择题
Under normal conditions a liferaft is released from itscradle by（）.
A.cutting the restraining strap B.unscrewing the turnbuckle on the back of the cradle C.lifting one end of the raft D.pushing the plunger on the center of the hydrostatic release
单项选择题 Two individuals authorized to serve as a lifeboatman must be assigned to any lifeboat that has a capacity of more than（）.
单项选择题 The water pockets located on the underside of inflatable liferafts（）.
单项选择题 The signal given to commence lowering the lifeboats is（）.
