全文获取类型
收费全文 | 14681篇 |
免费 | 161篇 |
专业分类
各国政治 | 486篇 |
工人农民 | 1274篇 |
世界政治 | 705篇 |
外交国际关系 | 572篇 |
法律 | 8517篇 |
中国政治 | 55篇 |
政治理论 | 3206篇 |
综合类 | 27篇 |
出版年
2021年 | 42篇 |
2020年 | 80篇 |
2019年 | 120篇 |
2018年 | 1388篇 |
2017年 | 1319篇 |
2016年 | 1132篇 |
2015年 | 141篇 |
2014年 | 146篇 |
2013年 | 754篇 |
2012年 | 338篇 |
2011年 | 1062篇 |
2010年 | 1126篇 |
2009年 | 728篇 |
2008年 | 894篇 |
2007年 | 841篇 |
2006年 | 176篇 |
2005年 | 226篇 |
2004年 | 351篇 |
2003年 | 285篇 |
2002年 | 159篇 |
2001年 | 343篇 |
2000年 | 301篇 |
1999年 | 222篇 |
1998年 | 117篇 |
1997年 | 105篇 |
1996年 | 90篇 |
1995年 | 95篇 |
1994年 | 85篇 |
1993年 | 53篇 |
1992年 | 144篇 |
1991年 | 152篇 |
1990年 | 141篇 |
1989年 | 136篇 |
1988年 | 132篇 |
1987年 | 140篇 |
1986年 | 123篇 |
1985年 | 109篇 |
1984年 | 113篇 |
1983年 | 99篇 |
1982年 | 76篇 |
1981年 | 78篇 |
1980年 | 40篇 |
1979年 | 90篇 |
1978年 | 55篇 |
1977年 | 45篇 |
1975年 | 40篇 |
1974年 | 54篇 |
1973年 | 58篇 |
1972年 | 40篇 |
1971年 | 35篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
91.
92.
Some features of early child care are more prominent in Norway than in other countries, such as emphasis on the outdoor environment. Of general relevance and interest is the form of day care provided by forest day-care centers. Three ideas form the development of these centers placed in wild areas. First, throughout history, Norwegians have had a close attachment to nature and some parents want to provide their children with outdoor experiences at an early age. Second, urging children to play outdoors characterizes the image many parents have of a happy, healthy childhood. Third, provision of day care for children has always been restricted in western countries, forcing parents to invent types of service that can become part of an ecological system that promotes healthy development.The forest day-care centers developed recently represent a supplement to the wide typology of child care in the 21st century. The article outlines the connections between these ideas in general European and western history and Norwegian history and presents debate and decisions about a question dating from the last half of the 1980s. It concludes that the forest day-care centers are perhaps only a modern form of the original kindergarten concept, which started in Europe and America as gardens for children not gardens of children. 相似文献
93.
Deoxyribonucleic acid (DNA) typing of ribosomal ribonucleic acid (rRNA) genes was performed with a polymerase chain reaction (PCR) assay for species identification. A variable region of the 28S ribosomal RNA gene was amplified with primers complementary to flanking sequences phylogenetically well conserved. The products of twelve animal DNAs (human, Japanese monkey, dog, cattle, pig, cat, rabbit, mouse, rat, chicken, frog, and fish) were separated by polyacrylamide gel electrophoresis, each revealing a few bands ranging from 150 to 100 base pairs. The band patterns obtained from each DNA sample differed in number and size, which indicates the applicability of the method to species identification. Samples containing either as little as 1 pg of DNA or degraded DNA of 0.2 to 0.5 kb in length were able to give detectable bands. Postmortem human tissue DNAs were tested as an example. They showed a pattern identical to the human control one, which was distinct from those of the other animals examined. 相似文献
94.
N C Martin A A Pirie L V Ford C L Callaghan K McTurk D Lucy D G Scrimger 《Science & justice》2006,46(3):179-184
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling. 相似文献
95.
The 2003 Duma election resulted in the victory of the party of power, thereby strengthening managed democracy in Russia. Since then, political trends in Russia's regions and rural politics provide considerable evidence of the increasing ability of pro-Kremlin forces to maximise their electoral fortunes in national contests. These political trends make it likely that United Russia will not only emerge as the dominant party in the 2007 Duma election, but will provide the Kremlin and Putin's successor with a compliant lower house. The outcome is that Putin's successor will find the political infrastructure to continue managed democracy. 相似文献
96.
Netherlands International Law Review - 相似文献
97.
Gerd Langguth 《Asia Europe Journal》2003,1(1):25-42
With Asia's economy still booming in the second half of the 1990's “Asian values” were announced by some politicians (Lee
Kuan Yew, Mahatir, Ishihara, Mahbubani etc.) and contrasted with “Western values”. Soon a controversial debate within Asia
ensued (Kim, Fidel Ramos ea..), into which also the western democracies joined. The “West” however reacted rather defensively
to the new assertiveness of some Asian statesmen, inspite of the fact that the authors of this debate put into question the
western dominance in global value setting which has been in existence since the French revolution. But has this debate withstood
the test of time, the challenges posed by the recession in Asia and by the ever increasing globalization? Hardly. The crisis
has destroyed the notion that “Asian values” had been the main cause and guarantor of Asia's exorbitant growth rates.
While in the West Christianity forms the essential basics of culture, in Asia there is a multitude of coexisting - and frequently
confronting world religions. There is no other continent which in cultural and political terms is so contradictory and potentially
conflict ridden like Asia. “Asianism” as a concept was surely also intended as an instrument to integrate multiethnic Asian
societies with weak internal cohesion. At the same time it served to neutralize the human rights issue.
In the meantime the debate has become quieter and more dispassionate. In the developed West the notion gained acceptance to
abandon “Eurocentrism”. At the same time there is recognition that “Asian values” are not exclusive. Also in Europe the family
plays a special role. A debate on values is needed for societal integration – also in the “West” which should become more
aware of the need to reassert the origins of its own spiritual foundations. Following September 11th the west is well advised
to continue the dialogue on values with Asia.
Update and expanded version of an article first published in: Au?enpolitik IV/1996, p. 326 “Beginnt das pazifische Jahrhundert?”
I would like to thank Julia Prati for the translation of the updated and expanded version of this article 相似文献
98.
K Lalu P J Karhunen P Rautiainen 《The American journal of forensic medicine and pathology》1992,13(3):196-198
A 6-month-old girl died suddenly without any previous symptoms of heart failure. Autopsy examination showed cardiomegaly (97 g) with a severely fibrotized myocardium. The left coronary artery was originating from the pulmonary artery. Histologically, the myocardium showed myocardial infarcts of different ages, as well as grossly thickened arterial branches due to increased flow in left-right shunt. We suggest that rare anomalies of the coronary arteries should be considered in the autopsies of suspected sudden infant death syndrome cases. 相似文献
99.
K. Michael Reynolds Pamala L. Griset Ernest Scott 《American Journal of Criminal Justice》2006,31(1):1-17
Many attempts have been made over the last several decades to improve communication among law enforcement agencies. This article
is a case study of a “low-level” data sharing project in Florida that could serve as a national model. The Florida Law Enforcement
Data Sharing Consortium is a partnership between the University of Central Florida and more than one hundred law enforcement
agencies. It offers an inexpensive, yet technically advanced alternative to the proprietary data sharing model. Its distributed
architecture was endorsed by the Markle Foundation, the 9/11 Commission, and the 2004 National Security Act. Civil liberties
concerns raised by this and other types of data sharing projects are discussed. 相似文献
100.
U.S. Supreme Court Justice Thurgood Marshall offered his opinion regarding the utility of public opinion polls as a tool for assessing the “evolving standards of decency” regarding capital punishment. His arguments became known as the Marshall hypotheses and spawned a considerable body of empirical testing. The three Marshall hypotheses are: (1) support for capital punishment is inversely associated with knowledge about it, (2) exposure to information about capital punishment produces sentiments in opposition to capital punishment, but (3) exposure to information about capital punishment will have no impact on those who support it for retributive reasons. The results of previous tests of these hypotheses were somewhat mixed but supportive. None of these studies, however, examined the effects of change in knowledge levels with changes, if any, in death penalty attitudes and beliefs as needed for a more complete test of the Marshall hypotheses. The present study addressed this shortcoming. The results provided mixed support for these three hypotheses. That is, death penalty supporters were somewhat less informed than death penalty opponents; exposure to death penalty information and knowledge gains tended to be associated with attitudinal change in a directions suggested by these hypotheses; but, retributivists' attitudes toward and beliefs about capital punishment were not any more resistant to change than were the attitudes and beliefs of non-retributivists. 相似文献