全文获取类型
收费全文 | 17785篇 |
免费 | 782篇 |
专业分类
各国政治 | 835篇 |
工人农民 | 579篇 |
世界政治 | 1374篇 |
外交国际关系 | 641篇 |
法律 | 11488篇 |
中国共产党 | 2篇 |
中国政治 | 70篇 |
政治理论 | 3446篇 |
综合类 | 132篇 |
出版年
2021年 | 111篇 |
2020年 | 278篇 |
2019年 | 345篇 |
2018年 | 401篇 |
2017年 | 468篇 |
2016年 | 482篇 |
2015年 | 375篇 |
2014年 | 423篇 |
2013年 | 1843篇 |
2012年 | 447篇 |
2011年 | 508篇 |
2010年 | 441篇 |
2009年 | 451篇 |
2008年 | 470篇 |
2007年 | 432篇 |
2006年 | 466篇 |
2005年 | 396篇 |
2004年 | 413篇 |
2003年 | 395篇 |
2002年 | 392篇 |
2001年 | 723篇 |
2000年 | 673篇 |
1999年 | 491篇 |
1998年 | 263篇 |
1997年 | 251篇 |
1996年 | 201篇 |
1995年 | 196篇 |
1994年 | 240篇 |
1993年 | 215篇 |
1992年 | 340篇 |
1991年 | 379篇 |
1990年 | 340篇 |
1989年 | 362篇 |
1988年 | 340篇 |
1987年 | 316篇 |
1986年 | 376篇 |
1985年 | 321篇 |
1984年 | 279篇 |
1983年 | 294篇 |
1982年 | 186篇 |
1981年 | 189篇 |
1980年 | 140篇 |
1979年 | 223篇 |
1978年 | 136篇 |
1977年 | 129篇 |
1976年 | 118篇 |
1974年 | 143篇 |
1973年 | 142篇 |
1972年 | 126篇 |
1971年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
31.
V.K. Sharma R.K. Jadhav G.J. Rao A.K. Saraf Heeresh Chandra 《Forensic Science International Supplement Series》1991,50(2)
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning. 相似文献
32.
W G Eckert 《The American journal of forensic medicine and pathology》1991,12(2):119-125
This review chronicles the characteristics of deliberate and accidental mass poisonings that occurred in World Wars I and II, in Bhopal, and in other historical cases up to and including modern wars. It also considers approaches to the investigation of such cases from the medicolegal as well as general standpoints. 相似文献
33.
P. Gill C.H. Brenner J.S. Buckleton A. Carracedo M. Krawczak W.R. Mayr N. Morling M. Prinz P.M. Schneider B.S. Weir 《Forensic Science International Supplement Series》2006,160(2-3):90-101
The DNA commission of the International Society of Forensic Genetics (ISFG) was convened at the 21st congress of the International Society for Forensic Genetics held between 13 and 17 September in the Azores, Portugal. The purpose of the group was to agree on guidelines to encourage best practice that can be universally applied to assist with mixture interpretation. In addition the commission was tasked to provide guidance on low copy number (LCN) reporting. Our discussions have highlighted a significant need for continuing education and research into this area. We have attempted to present a consensus from experts but to be practical we do not claim to have conveyed a clear vision in every respect in this difficult subject. For this reason, we propose to allow a period of time for feedback and reflection by the scientific community. Then the DNA commission will meet again to consider further recommendations. 相似文献
34.
35.
He is author of many works about social class, including The Protestant Establishment Revisitedand Philadelphia Gentlemen,both published by Transaction Publishers. 相似文献
36.
37.
In a case of first impression, the Trademark Trial and AppealBoard of the US Patent and Trademark Office has held that theflavour orange is not registrable for use with quick-dissolvingantidepressant tablets and pills. 相似文献
38.
This paper links the policy context regarding S&T parks to the objectives and characteristics of the established parks and
incubators in a relatively small, converging European country. S&T parks and incubators in Greece during the past decade and
a half have gradually shifted in terms of ownership and management from university/research institute to the private sector
and in terms of financing from public to private funds, also involving the provision of seed capital and access to venture
capital. This gradual shift toward more private engagement has created a variety of models out of which, it is hoped, successful
innovative companies will emerge in larger numbers than in the past.
相似文献
相似文献
39.
ROBERT S. SUMMERS 《Ratio juris》2007,20(1):66-76
Abstract. The paper replies to Bix and Soper ( Bix 2007 ; Soper 2007 ). Bix's paper raises methodological questions, especially whether a form‐theorist merely needs to reflect on form from the arm‐chair so to speak. A variety of methods is called for, including conceptual analysis, study of usage, “education in the obvious,” general reflection on the nature of specific functional legal units, empirical research on their operation and effects, and still more. Further methodological remarks are made in response to Soper's paper. Soper suggests the possibility of substituting “form v. substance” of a unit as the central contrast here rather than form v. complementary material or other components of a unit. Various reasons are given here for not doing this. Among other things, it is also argued here that form does not, contrary to Soper's suggestion, always follow substance. 相似文献
40.
Despite some understanding of general correlates and possible antecedents to intimate partner violence (IPV) within the Christian
community, the impact of religious and spiritual factors tends to be confounded by other factors and is often misjudged. Archival
data from Wave III of the National Longitudinal Study of Adolescent Health (Add Health) were used to examine the impact of
nine religious and spiritual factors on the probability of IPV perpetration by males, aged 18 to 26, who nominally classified
themselves as Catholic, Protestant, or Christian. Logistic regression results indicated that IPV perpetration could not be
adequately predicted from the religious and spiritual factors. Given the geographic breadth and the size of the Add Health
sample, no finding of a predictive model for Christian male-perpetrated IPV challenges the paradigm that religious and spiritual
factors should be overtly addressed in faith-based batterers’ programs targeting young adult males. 相似文献