装潢艺术设计的学科范畴属于
A自然环境
B人工环境
C社会环境
D学术环境
Lifesaving equipment shall be stowed so that it will be ______..
A. locked up
B. readily accessible for use
C. inaccessible to passengers
D. on the topmost deck of the vessel at all time
Large quantities of uncovered big iron or billets should not be carried in the upper-tween
A. this does not eliminate the risk of cargo shifting
B. this will increase the metacentric height of the ship
C. this will decrease the gravity height of the ship
D. this will reduce the rolling period of the ship
吊钩是可以补焊的，当吊钩表面产生细微裂纹的时候，吊钩可以补焊，可以继续使用。()
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