单项选择题
The angle at which the anchor flukes penetrate the soil is the（）.
A.burial angle B.penetration angle C.fluke angle D.holding angle
单项选择题 The anchors on the bow are known as（）.
单项选择题 The above mentioned ship has been duly（）in accordance with the provisions of the convention referred to.
单项选择题 Tensile stress is a result of two forces acting in（）.
