Compared to internal structural plating，the exterior hull plating on a vessel is usually（）.

[单选题]The deck plating on a ship is supported primarily by deck longitudinals and deck（）.A . girdersB . stanchionsC . framesD . beam

[名词解释] 结构基因（structural gene）

[单选题]Vertical structural members attached to the floors that add strength to the floors are called（）.A . boss platesB . buckler platesC . stiffenersD . breast hook

[单选题]The fore and aft run of deck plating which strengthens the connection between the beams and the frames and keeps the beams square to the shell is called the（）.A . garboard strakeB . limber strakeC . sheer strakeD . stringer strake

[单选题]Structural stress on a ship can be reduced by（）.A . lessening the effect of environmental forcesB . even and symmetrical variable loadingC . local concentration of heavy consumablesD . increasing the metacentric height

[单选题]Structural stress levels in a ship are the sum of loading stresses and stresses due to（）.A . environmental loadsB . variable loadsC . ballast loadingD . mooring load

[主观题]Structural unemployment 结构性失业

[名词解释] Structural unemployment 结构性失业

[单选题]Compared to a t-distribution with 10 degrees of freedom, and compared to a

[单选题]The disadvantages of rail compared with motor carrier are（）A . CostB . SpeedC . Lost and damage ratiosD . Transit time and frequency of service