A.are
B.is
C.have
D.has
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A.ship surveyor's report
B.a ship's certificate
C.a cargo inspection report
D.a diver survey report
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Connecting elements of a mooring system should be fabricated from（）.
The smallest size of flaw that can be detected on a radiograph examination of a weld will be indicated by the（）.
At（）an occasional survey has been carried out．
Chain slings are suitable for heavy slender articles，such as（）.
Hatch No.1 must be cleaned up to meet the（）of the cargo surveyors．
In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead（）.
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（）.
Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.
In the ship construction portfolio，materials which do not conform to ASTM or ABS specifications must also include the（）.
The end of the joint with the exterior threads is called the（）.