单项选择题
A.beams B.girders C.frames D.bulkheads
Structural stress on a ship can be reduced by（）.A.lesse...
单项选择题Structural stress on a ship can be reduced by（）.
A.lessening the effect of environmental forces B.even and symmetrical variable loading C.local concentration of heavy consumables D.increasing the metacentric height
Structural stress levels in a ship are the sum of loadi...
单项选择题Structural stress levels in a ship are the sum of loading stresses and stresses due to（）.
A.environmental loads B.variable loads C.ballast loading D.mooring loads
Keel scantlings of any vessel are greatest amidships be...
单项选择题Keel scantlings of any vessel are greatest amidships because（）.
A.connections between forebody and afterbody are most crucial B.of maximum longitudinal bending moments C.of severest racking stresses D.resistance to grounding is at a maximum amidships
