全文获取类型
收费全文 | 17770篇 |
免费 | 486篇 |
专业分类
各国政治 | 764篇 |
工人农民 | 779篇 |
世界政治 | 1474篇 |
外交国际关系 | 612篇 |
法律 | 10500篇 |
中国共产党 | 2篇 |
中国政治 | 81篇 |
政治理论 | 3868篇 |
综合类 | 176篇 |
出版年
2020年 | 222篇 |
2019年 | 272篇 |
2018年 | 352篇 |
2017年 | 423篇 |
2016年 | 435篇 |
2015年 | 307篇 |
2014年 | 364篇 |
2013年 | 1772篇 |
2012年 | 424篇 |
2011年 | 461篇 |
2010年 | 354篇 |
2009年 | 398篇 |
2008年 | 470篇 |
2007年 | 487篇 |
2006年 | 480篇 |
2005年 | 420篇 |
2004年 | 430篇 |
2003年 | 447篇 |
2002年 | 410篇 |
2001年 | 685篇 |
2000年 | 622篇 |
1999年 | 515篇 |
1998年 | 293篇 |
1997年 | 250篇 |
1996年 | 209篇 |
1995年 | 210篇 |
1994年 | 255篇 |
1993年 | 227篇 |
1992年 | 344篇 |
1991年 | 374篇 |
1990年 | 329篇 |
1989年 | 348篇 |
1988年 | 319篇 |
1987年 | 339篇 |
1986年 | 340篇 |
1985年 | 339篇 |
1984年 | 288篇 |
1983年 | 319篇 |
1982年 | 256篇 |
1981年 | 240篇 |
1980年 | 182篇 |
1979年 | 248篇 |
1978年 | 166篇 |
1977年 | 147篇 |
1976年 | 131篇 |
1975年 | 122篇 |
1974年 | 137篇 |
1973年 | 117篇 |
1972年 | 112篇 |
1971年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
Postmortem examination of a former professional basketball player revealed an abnormal heart, most notably a single coronary artery. The literature on single coronary arteries is briefly reviewed, and the possible mechanism which caused the patient's condition is considered. This case is particularly unusual because of the patient's profession, which is so physically demanding. 相似文献
132.
J B Kempton A Sirignano D H DeGaetano P J Yates W F Rowe 《Journal of forensic sciences》1992,37(6):1534-1540
The fingernail ridge patterns of a pair of identical twins were compared to each other, their parents, and an unrelated subject. The patterns of the twins' nails showed regions of strong similarity but were distinguishable from one another. Fewer similarities were found when comparing the nails to those of the parents and the unrelated control. The twins were shown to be monozygotic by means of DNA profiling. This therefore represents the first demonstration of unique fingernail ridge patterns in subjects shown conclusively to be identical twins. When the fingernail ridge patterns were examined with a scanning electron microscope, the backscattered electron (BEI) images were found to have superior contrast when compared to the secondary electron (SEI) images. 相似文献
133.
134.
135.
Anne M. Lavack Gina Clark 《Canadian public administration. Administration publique du Canada》2007,50(1):100-118
Abstract: In a continuing quest to build and defend world markets for tobacco products, tobacco companies have long been involved in international cooperation and information‐sharing through their own international corporate networks, as well as through national and international industry trade associations. This is evidenced in tobacco industry corporate documents now freely available on the internet. In order to institute effective tobacco control policy, policy‐makers needed to become equally astute at sharing information across national boundaries and at considering the cross‐national implications of policy and legislation. The World Health Organization has been instrumental in developing the Framework Convention on Tobacco Control (FCTC), and Canada has played an important part in this effort. The FCTC contains both demand‐reduction provisions and supply‐side provisions intended to reduce tobacco use worldwide. As a signatory to the FCTC, Canada has pledged to adhere to these provisions, thereby providing Canadian public administrators with effective tools to reduce tobacco use and its associated health burden both nationally and internationally. Sommaire: En cherchant continuellement à développer et à défendre les marchés mondiaux pour les produits du tabac, les sociétés productrices de tabac sont impliquées depuis longtemps dans la coopération internationale et le partage d'informations par le biais de leurs propres réseaux de sociétés internationales et d'associations professionnelles nationales et internationales. C'est ce qui ressort des documents des sociétés productrices de tabac auxquels on peut accéder librement sur Internet. Afin d'instituer une politique efficace de contrôle du tabagisme, les décideurs politiques ont dù devenir astucieux quant au partage d'informations et à l'étude des répercussions transnationales des politiques et des lois. L'Organisation mondiale de la santé a fortement contribuéà l'élaboration de la Convention‐cadre sur la lutte contre le tabagisme (CCLCT), et le Canada a joué un rôle important sur ce plan. La CCLCT contient à la fois des dispositions relatives à la réduction de la demande et d'autres relatives à l'offre qui visent à réduire la consommation de tabac dans le monde entier. En tant que pays signataire de la CCLCT, le Canada s'est engagéà respecter ces dispositions, fournissant ainsi aux administrateurs publics canadiens des outils efficaces pour réduire la consommation de tabac et le fardeau sur la santé qui lui est associéà l'échelle nationale et internationale. 相似文献
136.
137.
Brandon J. Kinne 《国际研究展望》2005,6(1):114-128
This paper applies the poliheuristic theory of foreign policy decision making to non-democratic states. Poliheuristic theory asserts that state leaders assign primary importance to their political survival; however, the meaning of "the political" varies dramatically from country to country. Furthermore, the types of actors who hold leaders politically accountable also vary between countries. Consequently, leaders often pursue vastly different means of ensuring their political survival. The author uses the common distinction between single-party, military, and personalist autocracies to show that apparently arbitrary differences in autocratic leaders' political concerns actually vary in systematic and potentially predictable ways. Because this argument is generalized to non-democratic states as a whole, it has important implications for the ways in which democratic states craft their policies toward autocracies. 相似文献
138.
139.
140.