首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   23497篇
  免费   909篇
  国内免费   4篇
各国政治   1055篇
工人农民   716篇
世界政治   1714篇
外交国际关系   1011篇
法律   12923篇
中国共产党   384篇
中国政治   882篇
政治理论   4641篇
综合类   1084篇
  2021年   164篇
  2020年   368篇
  2019年   387篇
  2018年   440篇
  2017年   526篇
  2016年   532篇
  2015年   462篇
  2014年   542篇
  2013年   2338篇
  2012年   583篇
  2011年   802篇
  2010年   826篇
  2009年   876篇
  2008年   824篇
  2007年   908篇
  2006年   969篇
  2005年   818篇
  2004年   580篇
  2003年   577篇
  2002年   652篇
  2001年   852篇
  2000年   676篇
  1999年   535篇
  1998年   350篇
  1997年   300篇
  1996年   248篇
  1995年   237篇
  1994年   254篇
  1993年   263篇
  1992年   359篇
  1991年   412篇
  1990年   363篇
  1989年   401篇
  1988年   361篇
  1987年   367篇
  1986年   406篇
  1985年   388篇
  1984年   310篇
  1983年   351篇
  1982年   243篇
  1981年   238篇
  1980年   195篇
  1979年   242篇
  1978年   170篇
  1977年   149篇
  1976年   149篇
  1975年   116篇
  1974年   166篇
  1973年   142篇
  1972年   123篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Blood previously acidified with aqueous saturated ammonium chloride solution was extracted with ethyl acetate. The dried extract was subjected to acetonitrile–hexane partition. The acetonitrile portion was analysed for the presence of acidic and neutral drugs by HPLC–DAD (200 mm×2.1 mm I.D. microbore ODS-Hypersil column) and GC–FID (25 m narrow-bore×0.25 mm I.D. HP-5 column with 0.33 μm film thickness). The protocol was found to be suitable for both clinical toxicology (including emergency toxicology) and postmortem toxicology. At least 66 drugs of interest were unequivocally identified by RRTs (HPLC) and UV spectra (DAD) match while another 12 were unequivocally identified by double RRTs match (HPLC and GC). Quantitation was facilitated by incorporating calibration blood standards in each assay batch. The five drugs most commonly encountered in clinical blood specimens (1150 cases) were: paracetamol (47.4% of the cases); chlormezanone (6.6%), theophylline (1.74%), naproxen (1.65%) and mefenamic acid (1.56%). The following drugs were detected in toxicologically significant quantities in postmortem blood specimens (245 cases): phenobarbitone (1.22% of the cases), naproxen (0.82%), chlormezanone (0.82%), theophylline (0.82%), carbamazepine (0.41%) and paracetamol (0.41%).  相似文献   
103.
104.
105.
This article examines the effect upon damages for personal injury of methods used in the United States of America to calculate loss of future earnings. The work of lawyers is examined from the perspective of labour economists. The damages calculated by using these alternative methods are compared with those actually awarded in over a hundred cases determined by courts in England and Wales. This interdisciplinary and comparative study reveals that the tort system fails to satisfy one of its main objectives in that it does not provide recipients of damages with 'full' compensation.  相似文献   
106.
107.
Correlation between plasma and bone marrow tricyclic antidepressants has not been studied before. Two groups of rabbits were given 10 and 20 mg of desipramine/kg body weight, respectively. Desipramine was administered to the animals once daily by mouth for 5 days. On the fifth day the animals were sacrificed and blood and bone marrow samples were collected and analyzed using a high performance liquid chromatographic (HPLC) method. Data showed that a correlation exists between bone marrow and blood desipramine. The bone marrow desipramine concentration increased as its blood levels increased. The average ratio of bone marrow to blood desipramine +/- S.D. (standard deviation) in both dosage groups was 37.2 +/- 4.46 with a range of 30.99-44.82. This investigation is promising and shows that bone marrow could be used as an alternative tissue in the absence of a suitable blood sample.  相似文献   
108.
The Green River Murder Investigation in King County, Washington, is currently the longest active serial murder investigation in U.S. history. During its course, over 26 separate scenes with from one to five victims each have been processed. The experience of the authors is presented in order to acquaint other agencies with techniques of outdoor scene processing that have evolved during recovery of remains from Green River and other skeletal cases.  相似文献   
109.
This article examines voluntary mediation and provides suggested criteria for attorneys in deciding whether or not to use mediation. The author discusses what mediation has to offer, what it takes to make it work, and important cautions for attorneys in deciding about the use of this process.  相似文献   
110.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号