问题
单项选择题
A term used to describe the dip in a towline that acts as a shock absorber is（）.
A.catenary
B.step
C.shock dip
D.bight
答案
参考答案：A
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A term used to describe the dip in a towline that acts as a shock absorber is（）.
A.catenary
B.step
C.shock dip
D.bight
参考答案：A
