问题描述： disappointed at和 disappointed by有什么区别 1个回答 分类：英语 2014-11-25 问题解答： 我来补答 e disappointed at 对……感到失望be disappointed by 被动语态.被……认为很失望（感到失望）一般少用这个eg:I was disappointed by my English teacher in the exam.这次考试,老师对我很失望. 展开全文阅读
