第28题: [单项选择]Which of the following statements regarding time of shipment is clear but not flexible( ) A. On or about May 25 2009 B. On May 25 2009 C. Before May 25 2009 D. Latest date of shipment:May 25 2009 参考答案:B 答案解析:[解析] B项将装运期规定在具体某一天,虽然规定很明确,但是规定得过于死板,没有一定的灵活性,难以被接受。ACD三项都是规范而且比较实用的装运期规定方法。