全文获取类型
收费全文 | 16444篇 |
免费 | 858篇 |
专业分类
各国政治 | 724篇 |
工人农民 | 561篇 |
世界政治 | 1239篇 |
外交国际关系 | 520篇 |
法律 | 10951篇 |
中国共产党 | 1篇 |
中国政治 | 84篇 |
政治理论 | 3148篇 |
综合类 | 74篇 |
出版年
2021年 | 92篇 |
2020年 | 286篇 |
2019年 | 338篇 |
2018年 | 365篇 |
2017年 | 443篇 |
2016年 | 446篇 |
2015年 | 386篇 |
2014年 | 388篇 |
2013年 | 1625篇 |
2012年 | 365篇 |
2011年 | 444篇 |
2010年 | 429篇 |
2009年 | 450篇 |
2008年 | 428篇 |
2007年 | 388篇 |
2006年 | 409篇 |
2005年 | 382篇 |
2004年 | 405篇 |
2003年 | 365篇 |
2002年 | 356篇 |
2001年 | 718篇 |
2000年 | 625篇 |
1999年 | 481篇 |
1998年 | 271篇 |
1997年 | 208篇 |
1996年 | 189篇 |
1995年 | 192篇 |
1994年 | 225篇 |
1993年 | 212篇 |
1992年 | 324篇 |
1991年 | 348篇 |
1990年 | 325篇 |
1989年 | 338篇 |
1988年 | 308篇 |
1987年 | 312篇 |
1986年 | 338篇 |
1985年 | 324篇 |
1984年 | 254篇 |
1983年 | 270篇 |
1982年 | 186篇 |
1981年 | 192篇 |
1980年 | 134篇 |
1979年 | 221篇 |
1978年 | 139篇 |
1977年 | 128篇 |
1976年 | 114篇 |
1975年 | 84篇 |
1974年 | 124篇 |
1973年 | 119篇 |
1972年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
Barry S. Levitt 《拉美政治与社会》2006,48(3):93-123
This article evaluates the effectiveness of OAS mechanisms for safeguarding democracy through multilateral diplomacy, what some scholars have dubbed the interamerican defense of democracy regime. Drawing on a range of international relations theories, this study derives competing hypotheses about member states' responses to democratic crises in the Americas. It then analyzes all instances in which a collective response—that is, an application of Resolution 1080 or the Inter-American Democratic Charter—was debated in the OAS between 1991 and 2002. Patterns of state behavior suggest that domestic politics, rather than the structural or systemic traits of the interamerican system, best explain foreign policy responses to crises of democracy in the region. The OAS record in confronting such crises is uneven. 相似文献
33.
34.
Although there has been speculation regarding the pervasiveness and nature of judicial decisions regarding life-sustaining medical treatment (LSMT), no attempt has been made to empirically assess their prevalence or the issues they address. An exploratory study utilizing a mail survey of a nationwide random sample (N = 905) of state trial court judges was conducted to provide initial information regarding this decision-making process. Twenty-two percent of the responding judges had heard at least one LSMT case, and judicial review did not appear endemic to particular states. The number of judges hearing LSMT cases dropped from 1975 to 1981 but has increased since then. Three major issues predominate: patient competency, appointment of a surrogate decisionmaker, and resolution of the ultimate issue of forgoing LSMT. Relatively few cases either contested a prior directive's validity or involved imposing sanctions for instituting or forgoing LSMT. Although subject to different interpretations, the results suggest the courts are having a significant impact on certain aspects of the LSMT decision-making process. However, the infrequency with which any one judge is called upon to make an LSMT decision causes concern about the judiciary's ability to respond in a timely and appropriate manner. With their potential for a profound effect on the actions of health care providers, greater attention to this decision-making process is warranted. 相似文献
35.
The remains of an unidentified female neonate were discovered in a field in central Missouri. Examination revealed bilateral absence of the parietal bones. A search of the literature describing similar defects suggests that the present case represents a unique condition, described here for the first time. 相似文献
36.
37.
We use data from 1983 and 1985 on the volume of Medicare physician services to analyze whether Medicare's Prospective Payment System (PPS), which resulted in a significant decline in hospital spending, led to a partially offsetting increase in real expenditures for physician services. We also analyze the effect of increases in assignment rates, increasing incomes of the elderly, and other factors on real expenditures during this period. Our main conclusion is that PPS has at most a small positive effect on real physician expenditures. Because people spent less time in the hospital, Medicare physician spending declined; but because of incentives to shift radiology and other services out of the hospital, some of this decline was offset. We also conclude that the sharp increase in Medicare assignment rates over this period, along with the rising incomes of the elderly during this period, contributed to the observed growth. 相似文献
38.
Reintegration was prioritised over demobilisation and disarmament in Tajikistan's peace process. Inadequate disarmament rates were disregarded, but integration of opposition fighters into military and law enforcement units was relatively swift. This created high levels of trust among the former fighters and commanders. The quick provision of incentives, such as comprehensive amnesties and the offer of government positions and economic assets created stakes in the peace process for a number of actors. Transitional justice was largely overlooked. In this way, the case of Tajikistan runs counter to key elements of what has been termed the ‘post-conflict reconstruction orthodoxy’. At the same time, Tajikistan is a rare example of the emergence of post-war stability. This article provides a detailed account of the DDR process and outlines the incentives that it created for the warring parties. It also assesses the emergence of spoilers and the government's counter strategies. The article concludes by highlighting the consolidation of President Rakhmonov's power since 2001, but also raises some questions regarding the viability of Tajikistan's long-term political and economic development. 相似文献
39.
D.S.T Lo T.C Chao S.E Ng-Ong Y.J Yao T.H Koh 《Forensic Science International Supplement Series》1997,90(3):626
Blood previously acidified with aqueous saturated ammonium chloride solution was extracted with ethyl acetate. The dried extract was subjected to acetonitrile–hexane partition. The acetonitrile portion was analysed for the presence of acidic and neutral drugs by HPLC–DAD (200 mm×2.1 mm I.D. microbore ODS-Hypersil column) and GC–FID (25 m narrow-bore×0.25 mm I.D. HP-5 column with 0.33 μm film thickness). The protocol was found to be suitable for both clinical toxicology (including emergency toxicology) and postmortem toxicology. At least 66 drugs of interest were unequivocally identified by RRTs (HPLC) and UV spectra (DAD) match while another 12 were unequivocally identified by double RRTs match (HPLC and GC). Quantitation was facilitated by incorporating calibration blood standards in each assay batch. The five drugs most commonly encountered in clinical blood specimens (1150 cases) were: paracetamol (47.4% of the cases); chlormezanone (6.6%), theophylline (1.74%), naproxen (1.65%) and mefenamic acid (1.56%). The following drugs were detected in toxicologically significant quantities in postmortem blood specimens (245 cases): phenobarbitone (1.22% of the cases), naproxen (0.82%), chlormezanone (0.82%), theophylline (0.82%), carbamazepine (0.41%) and paracetamol (0.41%). 相似文献
40.