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
991.
Knoppers BM 《McGill law journal. Revue de droit de McGill》2000,45(2):559-566
Rapid developments in the area of biotechnology within the next decade are likely to have a significant impact on Canadian society. This article outlines the practical and ethical issues that will need to be addressed in the face of scientific advances, and contemplates the development of an appropriate policy framework in this regard. Surveying the approaches to policy development taken thus far, the author notes the underlying need for greater transparency and public participation. Rational and effective policies will only result from additional basic scientific data being made available to a more informed and engaged Canadian public. 相似文献
992.
AB0 antigens can be extracted from human bone tissue into aqueous solution during boiling and then identified by absorption elution test. 相似文献
993.
Simonov EA Sorokin VI Drozdov MA Kimstach TB Liubetskiĭ GV Vershtskaia GV 《Sudebno-meditsinskaia ekspertiza》2000,43(3):23-28
A protocol for comparative analysis of heroin making use of chromatographic methods and infra-red spectroscopy is presented. 相似文献
994.
995.
996.
Describes the method of comparative analysis of various objects in practical medical criminology and making of high-quality photographs with the use of Adobe Photoshop software. Options of the software needed for expert evaluations are enumerated. 相似文献
997.
998.
Campman SC Holmes JF Sokolove PE Romero JA Yost BA Lie JT 《The American journal of forensic medicine and pathology》2000,21(1):69-73
Arterial fibromuscular dysplasia (FMD) represents a collection of noninflammatory and nonatherosclerotic vascular diseases with a poorly understood etiology. Classically occurring in renal and cerebral arteries, this entity has also been reported in coronary, carotid, and other medium and small arteries. One case occurring in the pulmonary vasculature has been reported. Fatal hemothorax and lung hemorrhage have multiple causes, including other vascular malformations and connective tissue disorders; however, cases of pulmonary FMD are exceedingly rare. We report what appears to be the second such association, occurring in a 69-year-old man. The patient presented with a 3-week history of increasing dyspnea, fatigue, and productive cough; 3 days of increasing back and chest pain; and syncope. Chest radiograph showed a "white-out" of the left lung. The patient died shortly after admission from a fulminant respiratory disease of undetermined etiology. At autopsy he was found to have a massive left hemothorax resulting from an unsuspected pulmonary arterial fibromuscular dysplasia. 相似文献
999.
Mallak CT Milch KS Horn DF 《The American journal of forensic medicine and pathology》2000,21(1):79-82
The diagnosis of sudden infant death syndrome (SIDS) has been an enigma to medical examiners and coroners for decades. The recent drastic decrease in the number of SIDS cases has been associated with infants sleeping supine instead of prone. The apparent relation between sleeping position and SIDS has led to the marketing of several positioning sleep aids. We report a case of the improper use of one such device which resulted in the death of an infant. 相似文献
1000.
Distributive and Procedural Justice in Seven Nations 总被引:1,自引:0,他引:1
The paper examines the impact of distributive justice and procedural justice variables on judgments in seven countries (Bulgaria, France, Hungary, Poland, Russia, Spain, and the United States). Subjects were presented with each of two experimental vignettes: one in which the actor unsuccessfully appeals being fired from his job and one in which the actor unsuccessfully goes to an employment agency to seek a job; they were asked to rate the justness of the outcome and how fairly the actor had been treated. The vignettes manipulated deservingness and need of the actor (distributive justice factors) and impartiality and voice in the hearing (procedural justice factors). Four hypotheses were tested: first, a distributive justice hypothesis that deservingness would be more important than need in these settings; second, a procedural justice hypothesis that the importance of voice and impartiality vary depending on the nature of the encounter and the forum in which it is resolved; third, because of their recent socialist experience, Central and Eastern European respondents make greater use of need information and less use of deservingness information than Western respondents; and fourth, that distributive justice and procedural justice factors interact. The distributive justice hypothesis is supported in both vignettes. The procedural justice hypothesis receives some support. Impartiality is more important in the first vignette and voice is more important in the second vignette. The interaction hypothesis was not supported in the first vignette, but does receive some support in the second vignette. The cultural hypothesis is not supported in either vignette. The implications for distributive and procedural justice research are discussed. 相似文献