全文获取类型
收费全文 | 8274篇 |
免费 | 239篇 |
国内免费 | 2篇 |
专业分类
各国政治 | 382篇 |
工人农民 | 241篇 |
世界政治 | 579篇 |
外交国际关系 | 378篇 |
法律 | 4421篇 |
中国共产党 | 83篇 |
中国政治 | 256篇 |
政治理论 | 1633篇 |
综合类 | 542篇 |
出版年
2021年 | 68篇 |
2020年 | 106篇 |
2019年 | 116篇 |
2018年 | 165篇 |
2017年 | 168篇 |
2016年 | 155篇 |
2015年 | 140篇 |
2014年 | 164篇 |
2013年 | 807篇 |
2012年 | 228篇 |
2011年 | 260篇 |
2010年 | 303篇 |
2009年 | 297篇 |
2008年 | 273篇 |
2007年 | 292篇 |
2006年 | 322篇 |
2005年 | 253篇 |
2004年 | 224篇 |
2003年 | 209篇 |
2002年 | 184篇 |
2001年 | 245篇 |
2000年 | 194篇 |
1999年 | 169篇 |
1998年 | 102篇 |
1997年 | 93篇 |
1996年 | 69篇 |
1995年 | 76篇 |
1994年 | 74篇 |
1993年 | 84篇 |
1992年 | 122篇 |
1991年 | 152篇 |
1990年 | 132篇 |
1989年 | 145篇 |
1988年 | 133篇 |
1987年 | 153篇 |
1986年 | 139篇 |
1985年 | 150篇 |
1984年 | 139篇 |
1983年 | 147篇 |
1982年 | 100篇 |
1981年 | 94篇 |
1980年 | 90篇 |
1979年 | 94篇 |
1978年 | 76篇 |
1977年 | 58篇 |
1976年 | 66篇 |
1975年 | 62篇 |
1974年 | 69篇 |
1973年 | 67篇 |
1969年 | 56篇 |
排序方式: 共有8515条查询结果,搜索用时 15 毫秒
61.
62.
Andrew M. Greeley is a priest, sociologist, novelist, and journalist. His scholarly writings concentrate on religion and ethnicity.
His other writings range from critiques of the Catholic church to best-selling novels. 相似文献
63.
64.
A report of an international collaborative experiment to demonstrate the uniformity obtainable using DNA profiling techniques. 总被引:2,自引:0,他引:2
P Gill S Woodroffe W B?r B Brinkmann A Carracedo B Eriksen S Jones A D Kloosterman B Ludes B Mevag 《Forensic science international》1992,53(1):29-43
This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP). 相似文献
65.
柔嫩艾美球虫杨凌株表面抗原SAG10基因的克隆与原核表达 总被引:2,自引:0,他引:2
从柔嫩艾美球虫第二代裂殖子总RNA中扩增EtSAG10基因,与pGEM-T Easy载体连接后转化大肠杆菌(E.coli)DH5α,筛选阳性克隆,扩增不含N端信号肽的编码序列,分别插入表达载体pET-32a( )和pMAL-c2X,转化至E.coliRosetta,以IPTG诱导表达。结果表明,pET-32a( )-EtSAG10在E.coliRosetta中的表达产物约占菌体总蛋白的43%,融合蛋白分子质量约为47 ku,以包涵体形式存在;而pMAL-c2X-EtSAG10在E.coliRosetta中表达的重组蛋白为可溶性,表达产物约占菌体总蛋白的35%,融合蛋白分子质量约为69 ku。以表达的可溶性EtSAG10重组蛋白100μg/只肌肉注射免疫雏鸡,攻虫后以盲肠病变计分、盲肠卵囊数(OPG)、相对增重率和抗球虫指数(ACI)评价,免疫组相对盲肠卵囊产量为47.7%,抗球虫指数由86.79提高至152.13。提示,重组表达的EtSAG10可诱导雏鸡产生一定的抗球虫免疫保护。 相似文献
66.
67.
The impact of high temperatures (24 to 39 degrees C) and low to moderately high humidities (20 to 70%) on the applicability of TLC systems for drug identification was studied during a 6 month climatologic cycle in Burkina Faso (West Africa). In general, the Rf values as observed on the plates were found to be substantially affected as compared with values obtained at temperate climates. Some TLC systems were more affected than others and the largest deviations of up to 30 Rf units were at low humidities. Tropical conditions also had a negative effect on the reproducibility of Rf values. However, when an Rf-correction procedure was applied, using reference mixtures of known drugs on each plate, accuracy as well as reproducibility of the resulting Rfc values were drastically improved and data thus corrected were found to be compatible with existing TLC data bases developed under moderate climatological conditions. The impact of high to extremely high humidities (70 to 100%) remains to be investigated. 相似文献
68.
The role of the state is changing under the impact of, for example, globalization. The changes have been variously understood as the new public management (NPM), the hollowing–out of the state and the new governance. This special issue of Public Administration explores the changing role of the state in advanced industrial democracies. It focuses on the puzzle of why states respond differently to common trends.
This introductory article has three aims. First, we provide a brief review of the existing literature on public sector reform to show that our approach is distinctive. We argue that the existing literature does not explore the ways in which governmental traditions shape reform. Second, we outline an interpretive approach to the analysis of public sector reform built on the notions of beliefs, traditions, dilemmas and narratives. We provide brief illustrations of these ideas drawn from the individual country articles. Finally, we outline the ground covered by all the chapters but we do not summarize and compare their experiences of reform. That task is reserved for the concluding article. 相似文献
This introductory article has three aims. First, we provide a brief review of the existing literature on public sector reform to show that our approach is distinctive. We argue that the existing literature does not explore the ways in which governmental traditions shape reform. Second, we outline an interpretive approach to the analysis of public sector reform built on the notions of beliefs, traditions, dilemmas and narratives. We provide brief illustrations of these ideas drawn from the individual country articles. Finally, we outline the ground covered by all the chapters but we do not summarize and compare their experiences of reform. That task is reserved for the concluding article. 相似文献
69.
We consider the problem of drawing inferences within a legal framework when a person is a suspect for two separate offences. Although we are primarily concerned with scientific evidence the issue inevitably arises as to how that evidence interacts with other, non-scientific evidence. We show that, in this particular context, the evidence can be conveniently classified into three categories that concern, respectively: the first crime only; the second crime only; and evidence that relates to similarities between the two crimes. Two case examples are considered and we consider DNA, fibres and eyewitness evidence. These are viewed from the perspective of a prosecutor who has to decide whether or not to charge a suspect with one or both crimes. Graphical sensivity analyses are presented which have features that are not intuitively obvious. 相似文献
70.
公务员行政赔偿责任涉及到行政相对人、公务员和行政主体三方的关系,是国家赔偿制度的重要组成部分,法国公务员行政赔偿责任制度历经发展,形成了以"个人过错"为核心的、允许行政相对人直接向公务员求偿的行政赔偿责任制度,并通过一系列判例确认了各项具体制度,易于操作,达到了合法性与效率之间的理性与平衡. 相似文献