全文获取类型
收费全文 | 7912篇 |
免费 | 197篇 |
专业分类
各国政治 | 246篇 |
工人农民 | 304篇 |
世界政治 | 454篇 |
外交国际关系 | 266篇 |
法律 | 5583篇 |
中国政治 | 41篇 |
政治理论 | 1155篇 |
综合类 | 60篇 |
出版年
2020年 | 90篇 |
2019年 | 108篇 |
2018年 | 157篇 |
2017年 | 137篇 |
2016年 | 176篇 |
2015年 | 94篇 |
2014年 | 140篇 |
2013年 | 648篇 |
2012年 | 195篇 |
2011年 | 250篇 |
2010年 | 166篇 |
2009年 | 179篇 |
2008年 | 218篇 |
2007年 | 225篇 |
2006年 | 220篇 |
2005年 | 161篇 |
2004年 | 214篇 |
2003年 | 212篇 |
2002年 | 188篇 |
2001年 | 343篇 |
2000年 | 327篇 |
1999年 | 243篇 |
1998年 | 80篇 |
1997年 | 73篇 |
1996年 | 68篇 |
1995年 | 69篇 |
1994年 | 73篇 |
1993年 | 77篇 |
1992年 | 172篇 |
1991年 | 182篇 |
1990年 | 211篇 |
1989年 | 207篇 |
1988年 | 228篇 |
1987年 | 210篇 |
1986年 | 172篇 |
1985年 | 173篇 |
1984年 | 139篇 |
1983年 | 126篇 |
1982年 | 75篇 |
1981年 | 66篇 |
1980年 | 53篇 |
1979年 | 79篇 |
1978年 | 69篇 |
1976年 | 57篇 |
1975年 | 55篇 |
1974年 | 72篇 |
1973年 | 63篇 |
1972年 | 55篇 |
1971年 | 57篇 |
1970年 | 63篇 |
排序方式: 共有8109条查询结果,搜索用时 15 毫秒
61.
N C Martin A A Pirie L V Ford C L Callaghan K McTurk D Lucy D G Scrimger 《Science & justice》2006,46(3):179-184
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling. 相似文献
62.
Presents forensic medical characteristics of the specific features of stabbed and cut injuries of human skin and jersey. Suggests a complex of signs that will help determine some structural parameters of a knife blade and the conditions of its interaction with the injured site of human body. 相似文献
63.
64.
65.
We consider the problem of drawing inferences within a legal framework when a person is a suspect for two separate offences. Although we are primarily concerned with scientific evidence the issue inevitably arises as to how that evidence interacts with other, non-scientific evidence. We show that, in this particular context, the evidence can be conveniently classified into three categories that concern, respectively: the first crime only; the second crime only; and evidence that relates to similarities between the two crimes. Two case examples are considered and we consider DNA, fibres and eyewitness evidence. These are viewed from the perspective of a prosecutor who has to decide whether or not to charge a suspect with one or both crimes. Graphical sensivity analyses are presented which have features that are not intuitively obvious. 相似文献
66.
Fair Trade has become a dynamic and successful dimension of an emerging counter-tendency to the neo-liberal globalisation regime. This study explores some of the dilemmas facing the Fair Trade movement as it seeks to broaden and deepen its impact among the rural poor of Latin America's coffee sector. We argue that the efforts to broaden Fair Trade's economic impact among poor, small-scale producers are creating challenges for deepening the political impact of a movement that is based on social justice and environmental sustainability. The study is based on two years' research and seven case studies of Mexican and Central American small-scale farmer cooperatives producing coffee for the Fair Trade market. 相似文献
67.
ROB T. GUERETTE 《犯罪学与公共政策》2007,6(2):245-266
Subsequent to U.S. Border Patrol (USBP) efforts to control illegal immigration throughout the 1990s, concern arose over an apparent increase in deaths of illegal migrants as they began to undertake more treacherous routes to enter the United States from Mexico. In response, the Border Safety Initiative (BSI) was created to increase safety along the southwest border. Using multiple data sources, including the USBP BSI Incident Tracking System, this study evaluated the impact of life‐saving efforts performed under the BSI program. Results indicate that there has been no overall reduction in the rate of migrant deaths since BSI has been in operation. However, an evaluation of BORSTAR search and rescue teams and the 2003 Lateral Repatriation Program (LRP), which returned apprehended migrants from Tucson sector to less hazardous places along the border, were found to be effective in preventing migrant deaths. Policy Implications: Critics of U.S. immigration policy claim that the only way reductions in migrant deaths along the U.S.‐Mexico border can be achieved is through liberalization of immigration policy and relaxing of border security. Yet, for more than a decade, U.S. policy makers have increased restrictions on immigration and have tightened security at the borders. Considering this, alternative means must be deployed in order to save migrant lives in the near term rather than waiting for a reversal of immigration policy. This study suggests that proactive life‐saving measures implemented through a harm‐reduction strategy can have some impact on saving migrant lives. 相似文献
68.
California is now in its 11th year of mandatory child custody mediation, with a current yearly case volume statewide estimated at 65,494. This article profiles the variations in programs and mediation styles in 56 of the state's 58 Superior Courts. Two research studies provide the basis for the information on program structures, case activity, procedures, agreement formats, recommendations, facilities, security, and fees. 相似文献
69.
The rebellion in Madagascar has been officially declared overby M. de Chevigné, the Governor-General. This accountof its background is written by one who served many years asa missionary mainly in the South-West of the Island and playeda prominent part in the occupation by the Allies during thewar. 相似文献
70.