单项选择题
A ship having continuous closely spaced transverse strength members is（）.
A.longitudinally framed B.transversely framed C.cellular framed D.web framed
单项选择题 A shepherd’s crook is used to（）.
单项选择题 A set of interior steps on a ship leading up to a deck from below is know as（）.
单项选择题 A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the（）.
