全文获取类型
收费全文 | 7087篇 |
免费 | 303篇 |
专业分类
各国政治 | 477篇 |
工人农民 | 243篇 |
世界政治 | 701篇 |
外交国际关系 | 501篇 |
法律 | 3047篇 |
中国政治 | 57篇 |
政治理论 | 2288篇 |
综合类 | 76篇 |
出版年
2023年 | 46篇 |
2022年 | 29篇 |
2021年 | 65篇 |
2020年 | 118篇 |
2019年 | 173篇 |
2018年 | 205篇 |
2017年 | 242篇 |
2016年 | 243篇 |
2015年 | 151篇 |
2014年 | 206篇 |
2013年 | 1190篇 |
2012年 | 207篇 |
2011年 | 212篇 |
2010年 | 203篇 |
2009年 | 217篇 |
2008年 | 197篇 |
2007年 | 260篇 |
2006年 | 237篇 |
2005年 | 258篇 |
2004年 | 252篇 |
2003年 | 248篇 |
2002年 | 249篇 |
2001年 | 137篇 |
2000年 | 136篇 |
1999年 | 113篇 |
1998年 | 102篇 |
1997年 | 103篇 |
1996年 | 99篇 |
1995年 | 96篇 |
1994年 | 101篇 |
1993年 | 84篇 |
1992年 | 96篇 |
1991年 | 102篇 |
1990年 | 75篇 |
1989年 | 76篇 |
1988年 | 71篇 |
1987年 | 67篇 |
1986年 | 77篇 |
1985年 | 78篇 |
1984年 | 60篇 |
1983年 | 70篇 |
1982年 | 59篇 |
1981年 | 61篇 |
1980年 | 45篇 |
1979年 | 41篇 |
1978年 | 34篇 |
1977年 | 35篇 |
1976年 | 32篇 |
1974年 | 19篇 |
1973年 | 16篇 |
排序方式: 共有7390条查询结果,搜索用时 15 毫秒
41.
42.
David DeGrazia 《The Journal of law, medicine & ethics》2006,34(1):49-57
Underlying President Bush's view regarding stemcell research and cloning are two assumptions: we originate at conception, and we have full moral status as soon as we originate. I will challenge both assumptions, argue that at least the second is mistaken, and conclude that the President's approach is unsustainable. 相似文献
43.
44.
45.
This study examines a crucial question: What kind of effect do interdiction and other drug enforcement activities have on drug smuggling? Do they actually deter smuggling, or is their effect more one of disruption and displacement?... 相似文献
46.
47.
David P. Colvin 《The Journal of Technology Transfer》1995,20(2):5-7
Historically, small businesses have been the innovation engine of the United States, with significantly more than half of the new technologies and products coming from small enterprises. In 1992, there were more than 21 million small businesses with fewer than 500 employees each in the United States, including 4.5 million small corporations, 1.6 million partnerships, and 15.1 million sole proprietorships. Although most small businesses have considerably fewer than 100 employees, they employ more than half the private U.S. work force, contribute more than half of all sales in the country, and are responsible for over half of the private sector's products. From 1976 to 1990, small firms also generated 65% of the net new jobs. From 1988 to 1990, all of the net new jobs in the U.S. economy were created by small firms. Indeed, small business is really big business in the United States. 相似文献
48.
Evaluating the Impact of Criminal Laws on HIV Risk Behavior 总被引:1,自引:0,他引:1
49.
50.
This introduction presents the core concepts that shape this special issue on the impact of violence and the processes of development in Central and South America. The understanding of development is considered in terms broader than the economic context alone, in order to assess wider social and political aspects. With a similarly expansive scope, forms of violence are addressed that range from direct physical harm and bodily attack to the often more subtle aggression of racialised abuse or the pressures on community-centred production from dominant market forces. In these contexts, violence, economic initiatives, and political allegiances form unintended and often dangerous networks of consequence for development matters. All the articles in this volume exemplify further the spatial environments of violence and diverse ‘landscapes of fear’ that shape our existence and help to define our actions, territories, and understanding of what happens around us. 相似文献