A.it
B.this
C.that
D.what
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A.approves
B.alleges
C.allows
D.permits
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
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The burden of proving unseaworthiness is upon those who（）it.
The lines led forward from the bow and aft from the stern when a vessel is moored to the dock are（）.
The conclusion is（）the said ship is fit to continue to sail.
Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
The above mentioned ship has been duly（）in accordance with the provisions of the convention referred to.
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（）.
Periodic surveys to renew the load line assignment for a ship must be made at intervals not exceeding（）.
Tensile stress is a result of two forces acting in（）.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
Before welding in a tank that has carried petroleum products，the tank must be certified by （）.