A.examine
B.to examine
C.being examined
D.examining
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A.necessity
B.responsibility
C.requirement
D.stipulation
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
最新試題
In which case is the IOPP Certificate of an inspected vessel NOT invalidated?（）
The end of the joint with the exterior threads is called the（）.
Tensile stress is a result of two forces acting in（）.
Chafing gear（）.
Please arrange the survey（）early．
The lines led forward from the bow and aft from the stern when a vessel is moored to the dock are（）.
Before welding in a tank that has carried petroleum products，the tank must be certified by （）.
The angle at which the anchor flukes penetrate the soil is the（）.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
The anchors on the bow are known as（）.