问题
单项选择题
What is meant by the term TOPPING THE BOOM?（）
A.Lowering the boom
B.Raising the boom
C.Spotting the boom over the deck
D.Swinging the boom athwartships
答案
参考答案：B
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What is meant by the term TOPPING THE BOOM?（）
A.Lowering the boom
B.Raising the boom
C.Spotting the boom over the deck
D.Swinging the boom athwartships
参考答案：B