第7题:[单选题] What could be a result of insufficient lubrication of lifeboat winches and davits ________. A.Moisture accumulation in winch motor damaging the electrical wiring B.Freezing of gears in cold weather C.Corroding of sheaves on the davits so they will not rotate D.All of the above 参考答案:D 【参考译文】救生艇绞车和吊艇架润滑不足会有什么后果?以上都是。A:水汽积聚在绞车马达内导致电线损坏B:寒冷天气下齿轮冻结C:滑轮腐蚀以至于不会转动 【解 析】insufficient lubrication润滑不足