【名词&注释】
预防措施(preventive measures)、质量问题(quality problem)、具体措施(concrete measures)、硫化汞(mercury sulfide)、主要成分(main components)、电源插座(outlet)、不合格品(reject)、强直性肌营养不良症(mytonic muscular dystrophy)、氧化汞(mercuric oxide)、不低于(no less than)
[单选题]In astern towing,a tow span,also called the tow bar or towing arch,is used to().
A. insure that the hawser leads directly aft as it passes over the stern of the towing vessel
B. increase the stability of the towing vessel by raising the hawser off the deck
C. reduce chafing of the towing hawser
D. prevent fouling of the hawser on deck gear located on the stern of the towing vessel