全文获取类型
收费全文 | 15287篇 |
免费 | 679篇 |
专业分类
各国政治 | 692篇 |
工人农民 | 601篇 |
世界政治 | 980篇 |
外交国际关系 | 486篇 |
法律 | 10040篇 |
中国共产党 | 3篇 |
中国政治 | 88篇 |
政治理论 | 2967篇 |
综合类 | 109篇 |
出版年
2020年 | 248篇 |
2019年 | 294篇 |
2018年 | 370篇 |
2017年 | 408篇 |
2016年 | 416篇 |
2015年 | 328篇 |
2014年 | 314篇 |
2013年 | 1597篇 |
2012年 | 370篇 |
2011年 | 389篇 |
2010年 | 380篇 |
2009年 | 411篇 |
2008年 | 409篇 |
2007年 | 369篇 |
2006年 | 408篇 |
2005年 | 376篇 |
2004年 | 393篇 |
2003年 | 347篇 |
2002年 | 343篇 |
2001年 | 550篇 |
2000年 | 484篇 |
1999年 | 391篇 |
1998年 | 206篇 |
1997年 | 184篇 |
1996年 | 173篇 |
1995年 | 172篇 |
1994年 | 175篇 |
1993年 | 195篇 |
1992年 | 322篇 |
1991年 | 336篇 |
1990年 | 300篇 |
1989年 | 323篇 |
1988年 | 266篇 |
1987年 | 303篇 |
1986年 | 291篇 |
1985年 | 280篇 |
1984年 | 249篇 |
1983年 | 272篇 |
1982年 | 172篇 |
1981年 | 164篇 |
1980年 | 129篇 |
1979年 | 206篇 |
1978年 | 141篇 |
1977年 | 128篇 |
1976年 | 109篇 |
1975年 | 102篇 |
1974年 | 111篇 |
1973年 | 123篇 |
1972年 | 101篇 |
1968年 | 90篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
Elizarova MK Konareva EG Kharichkova EV Shormanov VK 《Sudebno-meditsinskaia ekspertiza》2005,48(4):23-26
The results are presented of extraction of 1-methyl-3,4-dioxybenzene, 1-methyl-2,5-dioxybenzene and 4-oxybenzene acid from aqueous solutions with hydrophobic and hydrophilic organic soluvants. It is shown that the degree of extraction depends on the nature of the extragents and pH of the aqueous phase medium. Extraction multiplicity for obtaining necessary quantities of the compounds is calculated. 相似文献
994.
995.
By potential damage, chemical terroristic attacks are much more dangerous than terroristic bombing. To fight chemical terrorism it is necessary to create the system of medical-environmental defense of the population. In line with emergency medicine, forensic medical service is a very important element of the antiterroristic defense. The activity of forensic-medical experts in the field of terroristic chemical attack is analysed. 相似文献
996.
997.
Although representative payeeship is prevalent among people with mental illness and shows promise to positively influence
clinically relevant outcomes, research also suggests this legal mechanism could be implemented in ways that are problematic.
The current study examined whether family representative payeeship was associated with elevated risk of family violence perpetrated
by persons with severe mental illness (SMI). Data were collected every 4 months for 1 year in structured interviews with N
= 245 persons with SMI who received disability benefits. Multivariate analyses showed that substance abuse, history of violence,
frequency of family contact, and family representative payeeship were associated with elevated odds of family violence. Analyses
also showed family contact and family representative payeeship had a cumulative effect on increasing the predicted probability
of family violence (controlling for covariates such as violence history and substance abuse). The data shed light on the potential
for family representative payeeship to be associated with increased risk of interpersonal conflict and violence in SMI. 相似文献
998.
Tallichet SE Hensley C 《International journal of offender therapy and comparative criminology》2005,49(6):711-726
Despite the recent surge in society's interest in human violence, relatively few studies have been conducted examining the closely related phenomenon of animal cruelty. Although several researchers have begun to identify some of the correlates of animal cruelty, few have attempted to understand how differences in the backgrounds of rural and urban residents have led to their abuse of animals. Using survey data from 261 inmates, the authors investigate how demographic, familial differences and species type have contributed to the frequency of acts of animal cruelty. In general, early exposure to animal abuse is a strong predictor of the subsequent behavior. However, rural inmates learned to be cruel by watching family members exclusively, whereas urban inmates learned from family members and friends. Moreover, urban inmates chose dogs, cats, and wild animals as their target animals; however, rural inmates chose only cats. 相似文献
999.
A Re-examination of the Effects of Biased Lineup Instructions in Eyewitness Identification 总被引:1,自引:0,他引:1
Clark SE 《Law and human behavior》2005,29(5):575-604
A meta-analytic review of research comparing biased and unbiased instructions in eyewitness identification experiments showed
an asymmetry; specifically, that biased instructions led to a large and consistent decrease in accuracy in target-absent lineups,
but produced inconsistent results for target-present lineups, with an average effect size near zero (Steblay, 1997). The results
for target-present lineups are surprising, and are inconsistent with statistical decision theories (i.e., Green & Swets, 1966).
A re-examination of the relevant studies and the meta-analysis of those studies shows clear evidence that correct identification
rates do increase with biased lineup instructions, and that biased witnesses make correct identifications at a rate considerably
above chance. Implications for theory, as well as police procedure and policy, are discussed. 相似文献
1000.
Four reality monitoring variables were used to discriminate suspect from foil identifications in 183 actual criminal cases. Four hundred sixty-one identification attempts based on five and six-person lineups were analyzed. These identification attempts resulted in 238 suspect identifications and 68 foil identifications. Confidence, automatic processing, eliminative processing and feature use comprised the set of reality monitoring variables. Thirty-five verbal confidence phrases taken from police reports were assigned numerical values on a 10-point confidence scale. Automatic processing identifications were those that occurred “immediately” or “without hesitation.” Eliminative processing identifications occurred when witnesses compared or eliminated persons in the lineups. Confidence, automatic processing and eliminative processing were significant predictors, but feature use was not. Confidence was the most effective discriminator. In cases that involved substantial evidence extrinsic to the identification 43% of the suspect identifications were made with high confidence, whereas only 10% of the foil identifications were made with high confidence. The results of a laboratory study using the same predictors generally paralleled the archival results. Forensic implications are discussed. 相似文献