全文获取类型
收费全文 | 9298篇 |
免费 | 195篇 |
专业分类
各国政治 | 424篇 |
工人农民 | 351篇 |
世界政治 | 540篇 |
外交国际关系 | 359篇 |
法律 | 5844篇 |
中国共产党 | 1篇 |
中国政治 | 28篇 |
政治理论 | 1809篇 |
综合类 | 137篇 |
出版年
2020年 | 76篇 |
2019年 | 86篇 |
2018年 | 207篇 |
2017年 | 157篇 |
2016年 | 251篇 |
2015年 | 140篇 |
2014年 | 143篇 |
2013年 | 909篇 |
2012年 | 342篇 |
2011年 | 287篇 |
2010年 | 174篇 |
2009年 | 198篇 |
2008年 | 229篇 |
2007年 | 204篇 |
2006年 | 220篇 |
2005年 | 550篇 |
2004年 | 262篇 |
2003年 | 194篇 |
2002年 | 194篇 |
2001年 | 326篇 |
2000年 | 287篇 |
1999年 | 238篇 |
1998年 | 102篇 |
1997年 | 120篇 |
1996年 | 90篇 |
1995年 | 95篇 |
1994年 | 98篇 |
1993年 | 91篇 |
1992年 | 177篇 |
1991年 | 198篇 |
1990年 | 191篇 |
1989年 | 218篇 |
1988年 | 180篇 |
1987年 | 175篇 |
1986年 | 197篇 |
1985年 | 153篇 |
1984年 | 146篇 |
1983年 | 157篇 |
1982年 | 91篇 |
1981年 | 85篇 |
1980年 | 69篇 |
1979年 | 118篇 |
1978年 | 74篇 |
1977年 | 69篇 |
1976年 | 62篇 |
1975年 | 82篇 |
1974年 | 105篇 |
1973年 | 95篇 |
1972年 | 84篇 |
1971年 | 77篇 |
排序方式: 共有9493条查询结果,搜索用时 15 毫秒
141.
142.
143.
144.
An employer's capacity successfully to survive a strike will depend largely on the extent to which it has anticipated the strike and taken the steps necessary to defend against it. It is the purpose of this article to catalog the factors employers should consider in approaching an imminent strike and devising contingency plans. It attempts to focus on the types of problems, legal and practical, that frequently arise in strike situations, and suggests certain measures that employers may adopt in preparing for, and defending against, the economic impact of a strike. 相似文献
145.
Mnemic disturbances occurred in 8 of 14 subjects during a pharmcopsychological investigation of possible interactions between alcohol and dipotassium chlorazepate (Tranxilium). The blood alcohol concentrations were between 0.87% and 1.32%; the serum concentrations of the active metabolite nordiazepam were in the therapeutic range between 145 ng/ml and 345 ng/ml. The constitutional, dispositional, and situative conditions are presented. The forensic medical interpretation of such mnemic disturbances must be made critically and with reservation when evaluating a psychopathological state. 相似文献
146.
147.
148.
The Computer-Aided Design Centre has developed a new face recall system which enables a witness to construct the image of a suspect on a television screen. The system currently uses the Photofit library and method of construction. Likenesses of target faces produced by subjects (n=36) using the new system were compared to conventional Photofits produced by a second group of subjects (n=36) of the same targets. There was no difference on any of the three measures employed in the assessed quality of the likenesses produced by Photofit and the CADC System. Both systems tended to produce more recognizable composites when construction was carried out in the presence of the target compared to its absence. Composites made from memory on the initial trial were marginally better with the CADC System than with Photofit. While both systems showed low absolute accuracy, they enjoyed a measure of success in transmitting a likeness of a facial type. It is concluded that while the CADC system shows promise, psychological constraints upon witnesses' powers of recall may place limits on the absolute accuracy achievable with any system of face reconstruction.These experiments were financed by grant No. POL/73 1675/24/3 from the Police Scientific Development Branch of the U.K. Home Office. Points of view expressed in this article are solely those of the authors and do not necessarily reflect the opinions or positions of the funding body. Our gratitude and thanks are due to Tony Kitson and Clive Holloway for their many hours spent developing and operating the CADC system; Jean Shepherd for her skills as a Photofit operator; the Computer-Aided Design Centre; and the MRC Applied Psychology Unit, Cambridge for facilities and subjects. 相似文献
149.
150.