单项选择题
The annual survey for endorsement of a Load Line Certificate must be held within（）.
A.the three month period immediately following the certificate's anniversary date
B.the three month period immediately preceding the certificate's anniversary date
C.three months either way of the certificate's anniversary date
D.the three month period centered on the certificate's anniversary date
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The angle between the flukes and the shank of an anchor is called the（）.
A.holding angle
B.fleet angle
C.fluke angle
D.shank angle -
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（）.
A.bower anchors
B.kedge anchors
C.spare anchors
D.stream anchors
