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   12423篇
  免费   361篇
各国政治   558篇
工人农民   438篇
世界政治   900篇
外交国际关系   443篇
法律   7427篇
中国政治   89篇
政治理论   2819篇
综合类   110篇
  2020年   135篇
  2019年   214篇
  2018年   246篇
  2017年   286篇
  2016年   304篇
  2015年   217篇
  2014年   252篇
  2013年   1276篇
  2012年   271篇
  2011年   314篇
  2010年   265篇
  2009年   330篇
  2008年   336篇
  2007年   345篇
  2006年   335篇
  2005年   308篇
  2004年   284篇
  2003年   302篇
  2002年   297篇
  2001年   457篇
  2000年   413篇
  1999年   328篇
  1998年   206篇
  1997年   150篇
  1996年   167篇
  1995年   163篇
  1994年   155篇
  1993年   148篇
  1992年   253篇
  1991年   258篇
  1990年   259篇
  1989年   254篇
  1988年   247篇
  1987年   238篇
  1986年   267篇
  1985年   258篇
  1984年   237篇
  1983年   221篇
  1982年   158篇
  1981年   135篇
  1980年   117篇
  1979年   159篇
  1978年   88篇
  1977年   117篇
  1976年   96篇
  1975年   74篇
  1974年   91篇
  1973年   83篇
  1972年   78篇
  1971年   69篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
241.
An estimated three million Filipinos are at high-risk of being trafficked at any given time, representing 3.1% of the total Philippine population. The paper illustrates that corruption is a central issue in facilitating and continuing human trafficking in the Philippines. It demonstrates that if human trafficking is to be significantly reduced, then corruption must be curbed. The paper consists of three main sections. The first section is an overview of the trafficking problem in the Philippines. It discusses the scope of the problem such as the recruiters and traffickers, tactics used by the recruiters, and current transport routes and methods. The second section discusses current tactics being implemented by the government, non-government organizations (NGOs), and the international community to restrict human trafficking in the Philippines. It also illustrates that government corruption prevents the current tactics from being implemented well and in order to combat government corruption one must begin at the municipal level. The third section presents the inner workings of government and corruption at the municipal level, shows how the corruption reduces economic opportunities and legal equality for the citizenry, and how the loss of those opportunities and equality encourages migration from home municipalities—thereby encouraging human trafficking.  相似文献   
242.
Research on congressional parties assumes, but has not directly shown, that party size affects individual members' calculations. Drawing on a key case from the nineteenth‐century House—the secession‐driven Republican hegemony of 1861—this article explores the hypothesis that party voting not only declines but also becomes more strongly linked to constituency factors as relative party size increases. The analysis reveals that the jump in party size coincides with (1) a decrease in party voting among individual continuing members, (2) a strengthening association between some constituency factors and party voting, and (3) patterns of decline in individual party voting that are explained in part by constituency measures.  相似文献   
243.
The aim of the study was to investigate the process of desistance from sexual crime by comparing two groups of child molesters: One group was deemed to be desisting, while men in the other group were deemed as being still potentially active offenders. Men in the desisting group reported being optimistic for the future, reported an enhanced sense of personal agency and a more internalized locus of control, and identified treatment as being a turning point in their lives. In comparison, men in the active group were found to be more pessimistic and were more likely to blame external events, or situations, for their problems. One of the most striking findings of the research was that the desisting group had found a place within a social group or network, unlike the still potentially active offenders who all described a life of social isolation and alienation.  相似文献   
244.
目的 调查D18S872基因座在成都汉族 ,新疆维族和蒙古族 ,甘肃回族 4个民族中的遗传多态性 ,获得群体遗传学基本数据。 方法 等位基因分型标准物制备采用分子克隆技术 ,样本基因分型采用PCR和PAG垂直电泳技术、银染显色方法。 结果 获得D18S872基因座等位基因分型标准物及该基因座在 4个群体中的遗传学数据。 结论 结果表明D18S872基因座在法医学个人识别和亲子鉴定中有一定的应用价值。  相似文献   
245.
轻型颅脑损伤ABR的纵向研究   总被引:3,自引:0,他引:3  
目的 探索轻型颅脑损伤的电生理学指标 ,为早期临床诊断和预后判断以及法医学活体伤害鉴定提供依据。 方法 对相关病例进行脑干诱发电位 (ABR)的动态观察 ,并对结果进行统计学分析。 结果 6 0例轻型颅脑损伤患者伤后 48小时ABR的检测 ,显示主要异常表现为I-III峰间潜伏期的延长 ,说明此类损伤可造成脑干的功能紊乱。同时通过对其中 40例进行ABR追踪检测 ,结果显示大部分患者受伤三个月后脑功能状态恢复正常。 结论 轻型颅脑损伤ABR变化具有一定的特征 ,提示可作为早期临床诊断和预后判断以及法医学活体伤害鉴定的客观依据 ,应引起关注并展开进一步研究。  相似文献   
246.
Abstract: This is a case report of a 30‐year‐old man found dead in his flat lying on the floor with multiple stab wounds over the body, surrounded by an extensive volume of blood. Examination of the scene of death showed a secure flat, locked from inside. A blood‐stained knife was present close to the body and two unstained notes left on the sofa at the locus. A small plastic bag containing white powder (which following toxicological examinations appeared to be cocaine) and an almost full bottle of beer were present on a table. Autopsy revealed more than 40 stab wounds to neck, chest, and abdomen arranged in isolated groups within which the wounds showed similar directions and had a transverse orientation. Together with hesitation marks located on the neck and wrists these characteristics allowed to interpret this case as a suicide.  相似文献   
247.
Abstract: This study evaluates the use of polydimethylsiloxane polymer composites (PDMS, Fe–PDMS) as a passive sampling media to preconcentrate analytes found in environmental settings. Samplers were made using commercially available silicone products. The composite samplers were assessed for their sorption properties using Atrazine and Irgarol 1051 as model compounds. The initial study assessed the utility of PDMS sheets as adsorption material by following analyte depletion from spiked water samples by solid‐phase microextraction gas chromatography/mass spectrometry (GC/MS). Follow‐up studies conducted at high and low concentrations using lab manufactured iron‐ PDMS rods (Fe–PDMS) showed effective uptake at differential rates from concentrations ranging between 1 μg/L and 10 μg/L. Adsorption mechanism was reversible, and compounds were recovered from the exposed materials and analyzed by liquid–liquid extraction‐GC/MS. Both composites showed better affinity for Irgarol 1051, 100% removal, than for Atrazine, 30% removal, likely representing their KOW differences, 3.6 and 2.6, respectively. This “proof of concept” study demonstrates the positive implications for the use of silicon polymer composites as a monitoring tool for environmental forensic purposes.  相似文献   
248.
Abstract: An LC–MS method was developed for benzylpiperazine (BZP) and trifluoromethylphenylpiperazine (TFMPP), constituents of “party pills” or “legal herbal highs,” and their metabolites in human blood plasma. Compounds were resolved using a mixture of ammonium formate (pH 4.5, 0.01 M) and acetonitrile (flow rate of 1.0 mL/min) with a C18 column. Calibration curves were linear from 1 to 50 ng/mL (R2 > 0.99); the lower limit of quantification (LLOQ) was 5 ng/mL; the accuracy was >90%; the intra‐ and interday relative standard deviations (R.S.D) were <5% and <10%, respectively. Human plasma concentrations of TFMPP were measured in blood samples taken from healthy adults (n = 6) over 24 h following a 60‐mg oral dose of TFMPP: these peaked at 24.10 ng/mL (±1.8 ng/mL) (Cmax) after 90 min (Tmax). Plasma concentrations of 1‐(3‐trifluoromethyl‐4‐hydroxyphenyl) piperazine peaked at 20.2 ng/mL (±4.6 ng/mL) after 90 min. TFMPP had two disposition phases (t½ = 2.04 h (±0.19 h) and 5.95 h (±1.63 h). Apparent clearance (Cl/F) was 384 L/h (±45 L/h).  相似文献   
249.
Archaeological remains can provide concrete cases, making it possible to develop, refine or validate medico-legal techniques.In the case of the so-called ‘Joan of Arc's relics’ (a group of bone and archaeological remains known as the ‘Bottle of Chinon’), 14 specialists analysed the samples such as a cadaver X of carbonised aspect: forensic anthropologist, medical examiners, pathologists, geneticists, radiologist, biochemists, palynologists, zoologist and archaeologist. Materials, methods and results of this study are presented here.This study aims to offer an exploitable methodology for the modern medico-legal cases of small quantities of human bones of carbonised aspect.  相似文献   
250.
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