A.approves
B.alleges
C.allows
D.permits
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A.foot
B.heel
C.step
D.sole
A.prevent the boom from being raised too high
B.prevent the boom from swinging
C.support the boom when not in use
D.prevent the boom from being lowered
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
A.holding angle
B.fleet angle
C.fluke angle
D.shank angle
A.burial angle
B.penetration angle
C.fluke angle
D.holding angle
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During fueling，all doors，hatches，and ports（）.
Tensile stress is a result of two forces acting in（）.
Let’s submit the case（） the cargo surveyor.
Please arrange the survey（）early．
The above mentioned ship has been duly（）in accordance with the provisions of the convention referred to.
At（）an occasional survey has been carried out．
The end of the joint with the exterior threads is called the（）.
At least one reinspection shall be made on each vessel holding a Certificate of Inspection valid for two years. This inspection shall be held between the tenth and fourteenth months of the duration period of the certificate and shall be（）.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
Connecting elements of a mooring system should be fabricated from（）.