文档介绍：目 录中英文缩略语词汇对照表...........................................................................................4第一部分中文摘要.......................................................................................................6第一部分英文摘要.......................................................................................................9前言.............................................................................................................................12方法.............................................................................................................................14结果.............................................................................................................................16讨论.............................................................................................................................30第二部分中文摘要.....................................................................................................34第二部分英文摘要.....................................................................................................35前言.............................................................................................................................37方法.............................................................................................................................38结果.............................................................................................................................40讨论.............................................................................................................................44参考文献.....................................................................................................................47致谢.............................................................................................................................51学位论文原创性声明.................................................................................................52学位论文知识产权权属声明............................................