A life preserver or buoyant work vest is required to be worn on a ship when a person is ().
Each life preserver must be readily accessible to the person for whom it is intended while he or she is().
在asp.net中,如果使redim语句重新定义一个数组时可以使用Preserver关键字保留原值。()
Each life preserver must be readily accessible to the person for whom it is intended while he or she is().