Vertical structural members attached to the floors that add strength to the floors are called（）.

[名词解释] 结构基因（structural gene）

[单选题]Compared to internal structural plating，the exterior hull plating on a vessel is usually（）.A . strongerB . thinnerC . more corrosion resistantD . a lower grade steel

[名词解释] 附着龈attached gingiva

[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

[单选题]If the vertical center of gravity (VCG) of a ship rises 1.7 feet，the righting arm (GZ) for the various angles of inclination will（）.A . decreaseB . increaseC . remain unchangedD . be changed by the amount of GG' x cosine of the angle

[主观题]Structural unemployment 结构性失业

[名词解释] Structural unemployment 结构性失业

[主观题]Only members of the company______________________________(享用使用这设施的权利).

[单选题]We give you on the attached sheet full details regarding packing and markin9，which must be strictly__________．A . observedB . abide byC . submittedD . seen