分面浏览：发表日期 |
| 当前检索式 | ((ALL：保护对策)) |
| 限定条件 | ((内容类型：学位论文)) |
| 2023 1 | 2022 1 | 2020 4 |
| 2019 8 | 2018 16 | 2017 26 |
| 2016 28 | 2015 33 | 2014 26 |
| 2013 36 | 2012 25 | 2011 24 |
| 2010 40 | 2009 45 | 2008 24 |
| 2007 25 | 2006 68 | 2005 25 |
| 2004 15 | 2003 11 | 2002 11 |
| 2001 5 | 2000 8 | 1999 6 |
| 1998 2 | 1997 3 | 1994 1 |
| 1993 3 | 1990 1 | 1989 3 |
| 1988 1 | 1986 1 |
