问题
单项选择题
Ship’s steering gear refers to（）.
A.cargo handling machines
B.deck winches and derricks
C.engine-room tools
D.course controlling system
答案
参考答案：D
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Ship’s steering gear refers to（）.
A.cargo handling machines
B.deck winches and derricks
C.engine-room tools
D.course controlling system
参考答案：D