diff --git a/doc/Software_design_and_modeling/软件设计规格说明书-选修课选课系统.doc b/doc/Software_design_and_modeling/软件设计规格说明书-选修课选课系统.doc
index e55af9b..d75838d 100644
Binary files a/doc/Software_design_and_modeling/软件设计规格说明书-选修课选课系统.doc and b/doc/Software_design_and_modeling/软件设计规格说明书-选修课选课系统.doc differ