全文获取类型
收费全文 | 5003篇 |
免费 | 285篇 |
国内免费 | 1篇 |
专业分类
各国政治 | 358篇 |
工人农民 | 20篇 |
世界政治 | 655篇 |
外交国际关系 | 774篇 |
法律 | 1992篇 |
中国共产党 | 317篇 |
中国政治 | 562篇 |
政治理论 | 262篇 |
综合类 | 349篇 |
出版年
2023年 | 28篇 |
2022年 | 28篇 |
2021年 | 18篇 |
2020年 | 27篇 |
2019年 | 40篇 |
2018年 | 51篇 |
2016年 | 33篇 |
2015年 | 36篇 |
2014年 | 163篇 |
2013年 | 112篇 |
2012年 | 291篇 |
2011年 | 327篇 |
2010年 | 197篇 |
2009年 | 145篇 |
2008年 | 214篇 |
2007年 | 259篇 |
2006年 | 281篇 |
2005年 | 221篇 |
2004年 | 229篇 |
2003年 | 218篇 |
2002年 | 197篇 |
2001年 | 170篇 |
2000年 | 158篇 |
1999年 | 109篇 |
1998年 | 83篇 |
1997年 | 79篇 |
1996年 | 72篇 |
1995年 | 90篇 |
1994年 | 90篇 |
1993年 | 54篇 |
1992年 | 49篇 |
1991年 | 60篇 |
1990年 | 58篇 |
1989年 | 64篇 |
1988年 | 96篇 |
1987年 | 81篇 |
1986年 | 83篇 |
1985年 | 93篇 |
1984年 | 96篇 |
1983年 | 91篇 |
1982年 | 57篇 |
1981年 | 62篇 |
1980年 | 87篇 |
1979年 | 42篇 |
1978年 | 17篇 |
1977年 | 16篇 |
1964年 | 23篇 |
1962年 | 18篇 |
1959年 | 17篇 |
1957年 | 15篇 |
排序方式: 共有5289条查询结果,搜索用时 15 毫秒
991.
992.
993.
“统一俄罗斯”党奉行“保守主义的现代化”战略,其要旨就在于把自由和公正价值有机统一,构建独立自主的民主制度,使俄罗斯成为现代世界强国。作者以亨廷顿、托克威尔等人的理论为根据,认为任何民主都有自己的特色,多党制并非民主必须的条件,处于现代化进程中的俄罗斯,既不适合实行多党制,也不能实行一党制,而应该实行两党制或一党居优制,这是俄罗斯成为现代世界强国的基础和“支柱”。 相似文献
994.
非营利部门市场化:公民社会处在风险当中? 总被引:1,自引:0,他引:1
公共部门越来越多地采用市场的途径与理念来指导政策制定与管理.一些美国的公共管理学者已经指出了这个问题,其中特别强调其对民主与公民权利的影响. 相似文献
995.
996.
Gaulier JM Sauvage FL Pauthier H Saint-Marcoux F Marquet P Lachâtre G 《Journal of forensic sciences》2008,53(3):755-759
After a drug-facilitated sexual assault (DFSA), a woman was found in a drowsy state at home. She remembered having drunk an unknown beverage by the accused. Blood samples (collected 8 hours after the DFSA), two glasses, and a teaspoon seized by the police were analyzed. Acepromazine, a phenothiazine tranquilizer used in human and veterinary medicine, was detected in the residue of one of the glasses. In spite of acepromazine absence in the victim's blood, the possible use of acepromazine in the DFSA was reported to the police. Two weeks later, a suspect admitted having orally administered acepromazine to the victim. Using a liquid chromatography-tandem mass spectrometry method, this compound was subsequently detected (31 pg/mg) in a sample of the victim's hair collected a month and a half after the DFSA. A potential short elimination half-life in humans and/or the well-known in vitro degradation of acepromazine could explain the negative blood result. DFSA toxicological investigations are challenging and can be complicated when a rather unusual substance is concerned. In particular, special care should be taken when interpreting the results, taking into account elimination and/or instability data, when available. 相似文献
997.
LC-MS/MS测定尿液中可卡因及其代谢物苯甲酰爱康宁 总被引:4,自引:0,他引:4
目的建立尿液中可卡因(cocaine,COC)及其代谢物苯甲酰爱康宁(benzoylecgonine,BZE)的液相色谱-串联质谱分析方法。方法尿液经固相萃取后,用AllurePFP丙基柱分离,以V(甲醇):V(20mmol/L乙酸胺和0.1%甲酸的缓冲溶液)=80∶20为流动相,采用二级质谱多反应监测模式检测COC和BZE。按10mg/kg的剂量对豚鼠腹腔注射可卡因,给药后收集7d尿液。结果尿液中COC和BZE在2.0~100ng/mL质量浓度范围内线性关系良好(r=0.9995),最低检测限(LOD)为0.5ng/mL;回收率大于90%;日内和日间精密度均小于6%;豚鼠尿液中主要检测目标物是BZE,且BZE检测时限也较COC长。结论所建方法灵敏度高,选择性好,适用于尿液中可卡因和苯甲酰爱康宁的检测。 相似文献
998.
Discrepancies exist in research examining substance problems within groups of women arrested for intimate partner violence (IPV). In some studies women IPV arrestees have been found to be at high risk for substance-related problems, whereas in others they are found to be at low risk for substance-related problems. The current study explores these discrepancies then compares a sample of women court ordered to a domestic violence diversion program (n = 78) to a matched sample of men (n = 78) in the same program using police report information, self-report measures, the Substance Abuse Subtle Screening Inventory-3, and the Millon Clinical Multiaxial Inventory-III alcohol and drug subscales. Women IPV arrestees had a low occurrence of substance use during the arresting incident, a low incidence of substance-related diagnoses, and fewer substance-related problems than did men IPV arrestees. However, women demonstrated personality structures susceptible to nondiagnosable, hazardous drinking patterns. 相似文献
999.
Until now, determining the sex of a recently deceased individual using the measurement of the bicondylar breadth of the femur (also known as condylar width, epicondylar breadth and distal epiphyseal breadth) raised some concerns as to accuracy because no sample of contemporary French subjects was available. In this study, a sample of 88 female and male femurs taken from recently deceased elderly French people was studied. The bones were collected from subjects who had donated their bodies to the Medical School of Nice. The mean value of the male bicondylar breadth was found to be greater than that of females (84.3mm versus 74.8mm), confirming the sexual dimorphism of this parameter. Furthermore, the results showed a 95.4% accuracy rate for sexing individuals. To date, in the French population, as in some other samples, epicondylar breadth is the single most accurate measurement of sex determination, ahead even of head diameter. A discriminant function is presented to allow sex determination from remains of the distal femur. With regard to the data available in the literature, sexual dimorphism is probably the result of both genetic and environmental factors. The comparison of our results with those of other populations shows that there are inter-population variations of the bicondylar breadth, and also intra-population variations that account for the differences in the accuracy rate of this variable for the purposes of sex determination. These findings underscore the need to re-evaluate bone measurements within various contemporary populations. 相似文献
1000.
A retrospective study was undertaken of all cases of death due to suicidal electrocution in Sydney, Australia between 1996 and 2005. A total of 25 cases were identified with 20 cases (80%) as a result of direct attachment to an electrical outlet and five cases (20%) as a result of immersion in a body of water with an electrical appliance. Twenty of the 25 individuals were men (mean age = 57 years, range 22-90) and five were women (mean age 67, range 53-88). At least 35% of decedents were either currently working or had worked as electricians. Electrical timers had been used in eight (32%) cases, the fuse blown in one case, but the remaining 16 (64%) bodies were "live" on arrival of witnesses or electricity personnel. This study demonstrates the phenomenon of electrical suicide as a regular occurrence in Sydney. We highlight the need for investigators and emergency workers to remain vigilant upon discovery of electrical suicides, due to the fact that most bodies remain electrically active after death. 相似文献