首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   23910篇
  免费   515篇
各国政治   1015篇
工人农民   1527篇
世界政治   1445篇
外交国际关系   981篇
法律   13350篇
中国政治   115篇
政治理论   5838篇
综合类   154篇
  2021年   98篇
  2020年   200篇
  2019年   291篇
  2018年   1545篇
  2017年   1536篇
  2016年   1354篇
  2015年   325篇
  2014年   356篇
  2013年   1919篇
  2012年   537篇
  2011年   1267篇
  2010年   1307篇
  2009年   953篇
  2008年   1109篇
  2007年   1123篇
  2006年   431篇
  2005年   505篇
  2004年   611篇
  2003年   573篇
  2002年   466篇
  2001年   536篇
  2000年   479篇
  1999年   387篇
  1998年   252篇
  1997年   216篇
  1996年   236篇
  1995年   246篇
  1994年   242篇
  1993年   205篇
  1992年   310篇
  1991年   331篇
  1990年   293篇
  1989年   307篇
  1988年   285篇
  1987年   283篇
  1986年   322篇
  1985年   316篇
  1984年   286篇
  1983年   278篇
  1982年   195篇
  1981年   178篇
  1980年   150篇
  1979年   191篇
  1978年   123篇
  1977年   150篇
  1976年   121篇
  1975年   85篇
  1974年   102篇
  1973年   95篇
  1972年   92篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
In the early 1970s, Grand Canyon National Park intended to designate its land to “Wilderness,” including the controversial Colorado River corridor. However, by the end of the 1970s the potential for Wilderness designation was off the table, and would never seriously return for genuine consideration. Using Schattschneider's model of conflict, we explain how the organization of this conflict privileges the “causal story” of Wilderness opponents, and therefore why the canyon is not designated. It is our contention that members of Congress will not stand forward to support Wilderness designations without simultaneously providing benefits for extractive land use because (1) congressional representatives are more penalized for supporting than opposing Wilderness designations, (2) Wilderness advocacy groups do not pressure congressional delegates as firmly as opposition groups, and (3) key local congressional members are not likely to see Wilderness as a salient issue worth the risk of negative exposure. If these findings hold, the implication is that we may have reached the end of significant Wilderness designations in highly visible areas, unless critical aspects in land use conflict change.  相似文献   
14.
15.
There is widespread concern that higher education is being compromised by being turned into a ‘commodity’ to be ‘consumed’. This article represents an initial attempt to explore the trends in both the UK and US, and considers how the law has responded to them. It argues, however, that there is an important distinction to be drawn between ‘commodification’ and ‘consumerism’. Education has always been a commodity to be bought and sold; the true danger lies in the move to a ‘rights-based’ culture where students (and politicians) see education merely as something to be ‘consumed’ rather than as an activity in which to participate. Whilst the law seems thus far to have been something of a bulwark against this movement, it remains an open question as to whether this will continue to be the case if HEIs do not themselves act more proactively in challenging this damaging view of higher education.  相似文献   
16.
Several studies had concluded that the police subculture holds values and attitudes that are distinct from the rest of the population. Among these values is a focus on law and order. While researchers agree that police tend to hold different values, they disagree on the source of the attitudes. Some had argued that the attitudes reflected differences regarding who was recruited for law enforcement careers while others said that the differences reflected changes that occurred to individuals after becoming officers. This study examined whether police officers and students enrolled in criminal justice/sociology classes held similar or different attitudes towards the Miranda warnings. The findings suggested that in some ways, the two groups perceived the warnings in dramatically different ways, while in other ways their differences were simply a matter of degree. Implications are provided.  相似文献   
17.
Prosecution history estoppel generally bars patent infringementunder the doctrine of equivalents when a claim is narrowed byamendment during examination, but the ‘tangential relation’criterion preserves that doctrine when the claim is narrowedin a manner unrelated to the particular equivalent which, itis alleged, infringes the patent.  相似文献   
18.
19.
David Galef 《耶鲁评论》2003,91(3):166-172
  相似文献   
20.
轻型颅脑损伤ABR的纵向研究   总被引:3,自引:0,他引:3  
目的 探索轻型颅脑损伤的电生理学指标 ,为早期临床诊断和预后判断以及法医学活体伤害鉴定提供依据。 方法 对相关病例进行脑干诱发电位 (ABR)的动态观察 ,并对结果进行统计学分析。 结果 6 0例轻型颅脑损伤患者伤后 48小时ABR的检测 ,显示主要异常表现为I-III峰间潜伏期的延长 ,说明此类损伤可造成脑干的功能紊乱。同时通过对其中 40例进行ABR追踪检测 ,结果显示大部分患者受伤三个月后脑功能状态恢复正常。 结论 轻型颅脑损伤ABR变化具有一定的特征 ,提示可作为早期临床诊断和预后判断以及法医学活体伤害鉴定的客观依据 ,应引起关注并展开进一步研究。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号