单选题（） may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height).AA capstanBA holdCA warp endDA mooring drum
单选题
（） may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height).
A
A capstan
B
A hold
C
A warp end
D
A mooring drum
参考解析
解析：
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