全文获取类型
收费全文 | 3213篇 |
免费 | 36篇 |
专业分类
各国政治 | 165篇 |
工人农民 | 17篇 |
世界政治 | 322篇 |
外交国际关系 | 470篇 |
法律 | 1721篇 |
中国共产党 | 78篇 |
中国政治 | 224篇 |
政治理论 | 172篇 |
综合类 | 80篇 |
出版年
2021年 | 26篇 |
2018年 | 23篇 |
2016年 | 16篇 |
2015年 | 21篇 |
2014年 | 109篇 |
2013年 | 28篇 |
2012年 | 189篇 |
2011年 | 180篇 |
2010年 | 80篇 |
2009年 | 90篇 |
2008年 | 164篇 |
2007年 | 200篇 |
2006年 | 201篇 |
2005年 | 147篇 |
2004年 | 164篇 |
2003年 | 136篇 |
2002年 | 137篇 |
2001年 | 123篇 |
2000年 | 133篇 |
1999年 | 59篇 |
1998年 | 26篇 |
1997年 | 24篇 |
1996年 | 25篇 |
1995年 | 23篇 |
1994年 | 48篇 |
1993年 | 23篇 |
1992年 | 25篇 |
1991年 | 37篇 |
1990年 | 23篇 |
1989年 | 22篇 |
1988年 | 108篇 |
1987年 | 22篇 |
1986年 | 26篇 |
1985年 | 33篇 |
1984年 | 33篇 |
1983年 | 22篇 |
1982年 | 15篇 |
1981年 | 33篇 |
1980年 | 40篇 |
1979年 | 35篇 |
1978年 | 20篇 |
1977年 | 44篇 |
1976年 | 33篇 |
1965年 | 15篇 |
1964年 | 28篇 |
1963年 | 28篇 |
1962年 | 44篇 |
1961年 | 20篇 |
1960年 | 22篇 |
1959年 | 29篇 |
排序方式: 共有3249条查询结果,搜索用时 31 毫秒
141.
俄罗斯学者以前苏联和俄罗斯与西方文明的诞生、发展的历程进行对比,阐述了当代世界东西方的“价值观冲突”,并依此对欧亚一体化的前景做出展望,认为未来世界的主要界线仍然是价值观,一方面是绝对价值观支持者,另一方面是道德和价值观相对主义者。当前,西方强权虽在,但正在失去道义上的领导地位。文章引用了欧亚许多学者的观点,有一定的参考价值。 相似文献
142.
对一份文件最早制成时间的检验一直以来都是全世界文检界的难题之一。核实可疑文件的制成时间没有统一的方法,目前主要通过对纸张、墨迹、打字机、复印机、打印机、传真机、印刷品,以及笔迹和签名等因素的检验来确定一份文件的制成时间。文件检验人员需要充分利用他们手中的文件的内容及文件周边信息所反映出来的条件和材料,进而得出结论。 相似文献
143.
导论
在过往的两千多年里,政治哲学家、历史学家、人类学家以及社会学家已经完成了对于私有产权形成问题的解答。最近以来,经济学家也加入了探索这个问题的行列。本文所表达的是我自己对这个问题的看法,但愿读者会认为,此项研究对于理解一个复杂的问题来说,是一个理论上的推进。 相似文献
144.
Ladies, Gentlemen, Thank you for your notification of the 40th anniversary of the Chinese People's Association for Friendship with Foreign Countries and your recognition of the work we have done together to bring closer the People's Republic of China and France. 相似文献
145.
146.
147.
A method for simultaneous enantiomeric separation of ephedrine, pseudoephedrine, and methamphetamine (MA) in a single run by simple capillary zone electrophoresis (CZE) with beta-cyclodextrin as a chiral selector is described. The effects of the buffer pH, phosphate concentration, beta-cyclodextrin concentration, voltage and temperature on the peak resolution were examined. Good enantiomeric resolution was attained for each analyte under our optimized conditions: 15 mM beta-cyclodextrin, 300 mM NaH2PO4 at pH 2.5 with an uncoated capillary (64.5 cm x 50 microm), applied potential at 20 kV and temperature at 30 degrees C. Ultraviolet (UV) detection at a fixed wavelength (200 nm) was employed using a diode array detector. Using phentermine as an internal standard, migration times for all analytes are reproducible within 0.16% for intra-day and 0.6% for inter-day runs. Application of this method to the analysis of confiscated drugs is discussed. 相似文献
148.
Torres MC Osuna E Pérez-Cárceles MD Gómez-Zapata M Luna A 《The American journal of forensic medicine and pathology》2002,23(2):155-158
The authors evaluated the usefulness of the postmortem biochemical analysis of ionic ratios in different parts of the heart and their relation to cardiac damage caused by chest trauma, as observed by anatomopathologic study. Fifty-nine 59 cases were studied, selected from routine necropsies, and samples were taken from different sites of cardiac tissue. The cause of death was trauma in 40 cases and nontraumatic causes in 19 cases. The object of this study was to analyze the levels of Na+, K+, Ca+2, Mg+2, and Zn+2 in different zones of the heart, and the relationship between intracellular and extracellular ion ratios and the different causes of death and any anatomopathologic alterations observed. The biochemical tests revealed a possible relation between the ionic values and cause of death. Alterations in cell membrane permeability and corresponding modification of the ionic ratios were produced earlier than histologic alterations, which need longer to establish themselves whether or not they follow a traumatic process. 相似文献
149.
Trivedi R Chattopadhyay P Kashyap VK 《The American journal of forensic medicine and pathology》2002,23(2):191-196
A new method for better recovery of DNA suitable for amplification of hypervariable loci from fragments of teeth, consisting of two steps-scraping and aspiration, and extensive decalcification-is reported. Higher yields of high molecular weight DNA were obtained from the root, pulp, and crown of all kinds of 120 teeth, irrespective of gender, age, and source of teeth. HLA DQA1, 5 poly markers (LDLR, GYPA, HBGG, D7S8, and Gc), and other 12 short tandem repeat loci (HPRTB, F13B, LPL, D13S317, D7S820, D5S818, D21S11, D18S51, FGA, D8S1179, D3S1358, and vWA) could be successfully amplified and typed from recovered DNA. 相似文献
150.
In this review we consider how Slovenia could consider tackling its high rate of suicide (overall 29 per 100,000, 46 in males, 13 in females). First, we consider the evidence for risk factors that may contribute to Slovenia's high rate of suicide. Second, we describe the interventions to try to reduce the impact of these factors and the evidence for such interventions. We categorize interventions in terms of their operation at either the population level or that of high-risk groups. However, it should be borne in mind that settings often assumed to provide access to population groups, such as general practice and schools, do not reach some people who are likely to be at high risk; for example those who have dropped out of school or who have been excluded from a GP's list. We focus particularly on those for high-risk groups, as a number of East-European countries with high suicide rates such as Slovenia, Hungary, and the Baltic republics are currently considering a shift toward more community-based mental health services. The provision of community mental health services in Slovenia would provide an opportunity to study their impact on the suicide rate. However, we conclude that their development should be accompanied by other initiatives operating at population levels. This multilevel approach acknowledges the complexity of the etiology of suicide, the impossibility of reaching all those at risk through services and the lack of strong evidence for any one intervention. 相似文献