问题
单项选择题
The most common type of davit found on merchant vessels today is the（）.
A.radial
B.sheath-screw
C.gravity
D.quadrantal
答案
参考答案：C
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The most common type of davit found on merchant vessels today is the（）.
A.radial
B.sheath-screw
C.gravity
D.quadrantal
参考答案：C