全文获取类型
收费全文 | 6257篇 |
免费 | 136篇 |
专业分类
各国政治 | 271篇 |
工人农民 | 300篇 |
世界政治 | 491篇 |
外交国际关系 | 232篇 |
法律 | 3837篇 |
中国政治 | 55篇 |
政治理论 | 1186篇 |
综合类 | 21篇 |
出版年
2022年 | 32篇 |
2021年 | 40篇 |
2020年 | 78篇 |
2019年 | 110篇 |
2018年 | 144篇 |
2017年 | 133篇 |
2016年 | 141篇 |
2015年 | 80篇 |
2014年 | 129篇 |
2013年 | 662篇 |
2012年 | 154篇 |
2011年 | 167篇 |
2010年 | 135篇 |
2009年 | 152篇 |
2008年 | 184篇 |
2007年 | 178篇 |
2006年 | 158篇 |
2005年 | 143篇 |
2004年 | 176篇 |
2003年 | 139篇 |
2002年 | 110篇 |
2001年 | 319篇 |
2000年 | 287篇 |
1999年 | 205篇 |
1998年 | 89篇 |
1997年 | 89篇 |
1996年 | 60篇 |
1995年 | 61篇 |
1994年 | 59篇 |
1993年 | 49篇 |
1992年 | 132篇 |
1991年 | 151篇 |
1990年 | 144篇 |
1989年 | 131篇 |
1988年 | 121篇 |
1987年 | 126篇 |
1986年 | 102篇 |
1985年 | 103篇 |
1984年 | 101篇 |
1983年 | 88篇 |
1982年 | 62篇 |
1981年 | 74篇 |
1980年 | 38篇 |
1979年 | 77篇 |
1978年 | 44篇 |
1975年 | 42篇 |
1974年 | 50篇 |
1973年 | 54篇 |
1972年 | 40篇 |
1971年 | 34篇 |
排序方式: 共有6393条查询结果,搜索用时 9 毫秒
1.
2.
3.
Ellen K. Marshall Ph.D. 《Journal of Police and Criminal Psychology》2006,21(1):62-71
The present study measured the existence of traumatic stress symptomatology as reported by certified law enforcement officers
within the State of Delaware. A questionnaire was devised which documented age, sex, race, education, years of service, marital
status, children, rank, position, and shift work. The questionnaire was divided into parts which assessed the exposure and
the frequency of specific traumatic incidents experienced in the line of duty, and the frequency of experienced traumatic
symptomatology criteria: re-experiencing, numbing, and arousal. 相似文献
4.
5.
This study aimed to expand the scope of previous research by assessing the effectiveness of soot-removal techniques on glass from petrol-bomb debris using methods of 1% and 2% sodium hydroxide (NaOH) solutions, ultrasonic bath and vacuum suction. Of particular interest were the 1% and 2% NaOH solutions applied to the soot-covered surfaces. Petrol bombs containing petrol or a 50:50 mix of petrol and motor oil were exploded and the debris was collected for analysis. Favourable results were found to varying degrees using each of the soot-removal methods with the 1% and 2% NaOH wash solutions, being the most useful. The 2% NaOH solution also proved successful as a soak to loosen and remove heavy contamination of soot and accelerants without damaging the finger mark beneath. This study also found that recovery of finger marks in blood from beneath soot using the 2% NaOH solution was possible. Finger marks were also applied to glass bottles with plastic adhesive labels, and providing the fire damage is not too great marks were also retrievable. Results from this study lead to the conclusion that the NaOH wash solution is ideally suited for soot removal to reveal latent and blood-contaminated marks both within the laboratory and at crime scenes. 相似文献
6.
Netherlands International Law Review - 相似文献
7.
Linda C. McClain 《Family Court Review》2006,44(2):200-208
The debate over legalizing same‐sex marriage implicates the question of whether doing so would signal the end—or destruction—of the institution of marriage. The appeal to preserving a millennia‐old tradition of marriage against change fails to reckon with the evolution that has already occurred. Invocations of gender complementarity between parents as essential to child well‐being also conflict with growing recognition in family law that children's best interests can be served by gay and lesbian parents. Canada's path toward same‐sex marriage suggests that impasse need not be inevitable. In the United States, this impasse stems in part from the problem that same‐sex marriage serves as an emblem of everything that threatens marriage. 相似文献
8.
9.
10.