全文获取类型
收费全文 | 16745篇 |
免费 | 708篇 |
专业分类
各国政治 | 640篇 |
工人农民 | 576篇 |
世界政治 | 1270篇 |
外交国际关系 | 504篇 |
法律 | 11185篇 |
中国共产党 | 1篇 |
中国政治 | 95篇 |
政治理论 | 3106篇 |
综合类 | 76篇 |
出版年
2021年 | 92篇 |
2020年 | 267篇 |
2019年 | 319篇 |
2018年 | 349篇 |
2017年 | 435篇 |
2016年 | 439篇 |
2015年 | 336篇 |
2014年 | 405篇 |
2013年 | 1590篇 |
2012年 | 384篇 |
2011年 | 463篇 |
2010年 | 420篇 |
2009年 | 433篇 |
2008年 | 441篇 |
2007年 | 447篇 |
2006年 | 462篇 |
2005年 | 402篇 |
2004年 | 401篇 |
2003年 | 400篇 |
2002年 | 376篇 |
2001年 | 710篇 |
2000年 | 659篇 |
1999年 | 479篇 |
1998年 | 259篇 |
1997年 | 211篇 |
1996年 | 190篇 |
1995年 | 182篇 |
1994年 | 217篇 |
1993年 | 186篇 |
1992年 | 317篇 |
1991年 | 352篇 |
1990年 | 326篇 |
1989年 | 353篇 |
1988年 | 328篇 |
1987年 | 320篇 |
1986年 | 351篇 |
1985年 | 350篇 |
1984年 | 269篇 |
1983年 | 289篇 |
1982年 | 194篇 |
1981年 | 194篇 |
1980年 | 146篇 |
1979年 | 212篇 |
1978年 | 139篇 |
1977年 | 134篇 |
1976年 | 125篇 |
1974年 | 124篇 |
1973年 | 121篇 |
1972年 | 98篇 |
1970年 | 88篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
A case of fatal self-poisoning with dextromethorphan, an antitussive, and terfanadine, an antihistamine H1, is reported. Both drugs were quantified in several postmortem tissues and fluids using capillary gas chromatography coupled to mass spectrometry. Results are discussed in the light of the existing literature. 相似文献
82.
P J Karhunen H Brummer-Korvenkontio H Laaksonen M L Kantanen P Arstila P Leinikki 《Journal of forensic sciences》1992,37(5):1261-1268
In order to cooperate with voluntary screening programs aimed at the surveillance of the HIV epidemic in Finland, we have studied medicolegal autopsies for HIV antibodies since 1986 using an enzyme immunoassay on postmortem sera. The investigation covered 47.4% and 39.2%, respectively, of all deaths under the age of 65 years in the metropolitan areas of Helsinki and Turku--two cities on the densely populated southern coast of Finland from which most HIV infections have thus far been detected. Nine HIV-positive cases (0.12%) were detected among the 7305 medicolegal autopsies tested in 1986 to 1990. This figure is higher than the prevalence of 0.01 to 0.03% in voluntary screening programs for the general population would suggest. Seven of our cases had previously tested positive, and two were previously unknown cases, indicating that people at high risk are clustered in the medicolegal autopsy series. Of the six cases in an early stage of infection, three committed suicide suggesting the importance of HIV-screening in suicide cases in tracing symptomless HIV carriers. Five of the cases were detected in 1990, a year when the number of new HIV infections had more than doubled compared to the previous two years. This suggests that testing of medicolegal autopsies as surrogate tests for the population gives useful information even in low-prevalence areas like Finland. Such testing has none of the ethical problems of many other back-up surveys, and may be particularly sensitive to early changes in epidemiology. 相似文献
83.
A dissecting intramural haematoma of the coronary artery is an infrequent cause of sudden and unexpected death. Most cases are women and in a significant number of these women, the haematoma occurred at term to 80 days postpartum. Because the intimal rupture and communication with the lumen were not found in most of the cases, the site of rupture has been considered to be a vasa vasorum. The authors report on a case of one woman who was at a later postpartum period (106 days). The microscopic finding of the dissected coronary artery revealed two intimal tears in a section. The case showed that the dissecting intramural haematoma of the coronary artery is caused not only by the rupture of the vasa vasorum but also by the rupture of the intima. 相似文献
84.
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
85.
86.
James S. Bowman 《政策研究评论》1989,8(4):920-928
A final course, or project is a standard requirement in Master of Public Administration (MPA) programs. This requirement is intended to permit the student to demonstrate advanced ability in the discipline. This article examines one such course at Florida State University. The course included readings, exercises, oral presentations, and a written report. This author assesses the merits and drawbacks of the course as well as notes the unintended consequences that resulted. In concluding the article, the author makes several recommendations for future courses based on the experiences gained in the Florida state model. 相似文献
87.
In a free market world economy now characterized by a strong trend towards integrated economic areas dominated by North America,
Western Europe and the Pacific, effective cooperation is the key to sustained success.
Mr. Lautenberg is a diplomat, whose career has been strongly oriented on bilateral and multilateral economic matters (Poland,
FRG; GATT, EFTA, CSCE). Between 1970 and 1974, Mr. Lautenberg, who holds a degree in political sciences from the University
of Lausanne, led various research programs at the General Staff of the Department of Defense. 相似文献
88.
This study uses a structured vignette procedure to assess competency to make treatment decisions in two groups of adolescents, one at risk for institutional placement and the other a matched community sample. Scores on Factual Understanding (the ability to recall facts), Inferential Understanding (the ability to make inferences about those facts), and Reasoning (the ability to weigh risks and benefits of various treatment options and to make choices based on that reasoning) were compared. Results showed that while at-risk adolescents and their community, counterparts did not differ in their factual and inferential understanding abilities, the at-risk adolescents did significantly less well than the community adolescents in reasoning. This difference could not be fully explained by differences in verbal IQ. Girls, no matter what their risk status, scored higher than boys on the Reasoning scale. Implications for legal policies concerning adolescents are discussed. 相似文献
89.
ROBERT S. SUMMERS 《Ratio juris》1993,6(2):127-142
Abstract
The author presents a relatively formal theory of the rule of law which includes three basic components: conceptual, institutional and axiological. He then emphasizes the differences between a formal and a substantive theory of the rule of law and highlights the advantages and limits of the former. Finally, the author indicates the importance of this type of theory, namely the values it implies such as predictability, justified reliance, autonomous choice, minimization of disputes and legitimacy.** 相似文献
The author presents a relatively formal theory of the rule of law which includes three basic components: conceptual, institutional and axiological. He then emphasizes the differences between a formal and a substantive theory of the rule of law and highlights the advantages and limits of the former. Finally, the author indicates the importance of this type of theory, namely the values it implies such as predictability, justified reliance, autonomous choice, minimization of disputes and legitimacy.** 相似文献
90.
MARK S. HURWITZ 《Law & policy》2006,28(3):321-344
The manner in which agenda change occurs demonstrates how institutional arrangements influence agenda priorities in the Supreme Court and Courts of Appeals. A neo-institutional theoretic perspective is employed to examine the dynamics of agenda formation in these courts. The article finds that the Supreme Court's agenda choices influence the decisions of litigants, interest groups, and lawyers to appeal certain cases to the Courts of Appeals. While the Supreme Court's agenda primarily is influenced by internal factors, it is constrained by agenda changes in the appeals courts. Critically, it is shown that these federal appellate courts exist within an endogenous system with respect to agenda formation, as both courts respond to agenda changes made in the other over time. 相似文献