A.necessity
B.responsibility
C.requirement
D.stipulation
您可能感興趣的試卷
你可能感興趣的試題
A.to windward should be opened and the ones to leeward should be closed
B.to leeward should be opened and the ones to windward should be closed
C.should be opened
D.should be closed
A.squaring the corners
B.rounding the corners
C.plug welding the corners
D.slot welding the corners
A.cast iron
B.forged steel
C.stainless steel
D.cast steel
A.timber or steel rails
B.locomotives or boilers
C.railway passenger coaches
D.motor vehicles
A.reduces and prevents corrosion of standing rigging
B.prevents corrosion of running rigging
C.reduces and prevents wear caused by the rubbing of one object against another
D.protects the body against extreme cold
最新試題
The angle at which the anchor flukes penetrate the soil is the（）.
At（）an occasional survey has been carried out．
Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
Chain slings are suitable for heavy slender articles，such as（）.
In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead（）.
The document on a vessel，annually endorsed by an American Bureau of Shipping surveyor，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（）.
Connecting elements of a mooring system should be fabricated from（）.
Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure? （）
The end of the joint with the exterior threads is called the（）.