单选题The main function of the drawworks on a ship is to（）.Atransport tubulars from the pipe racks to the derrick floorBmaintain constant tension on the marine riserCstore and secure the excess drill lineDlower and hoist the drill string into and out of the drilled hole
单选题
The main function of the drawworks on a ship is to（）.
A
transport tubulars from the pipe racks to the derrick floor
B
maintain constant tension on the marine riser
C
store and secure the excess drill line
D
lower and hoist the drill string into and out of the drilled hole
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