全文获取类型
收费全文 | 16499篇 |
免费 | 525篇 |
专业分类
各国政治 | 1084篇 |
工人农民 | 687篇 |
世界政治 | 1284篇 |
外交国际关系 | 710篇 |
法律 | 9658篇 |
中国共产党 | 2篇 |
中国政治 | 177篇 |
政治理论 | 3286篇 |
综合类 | 136篇 |
出版年
2020年 | 226篇 |
2019年 | 260篇 |
2018年 | 374篇 |
2017年 | 406篇 |
2016年 | 411篇 |
2015年 | 322篇 |
2014年 | 385篇 |
2013年 | 1980篇 |
2012年 | 403篇 |
2011年 | 489篇 |
2010年 | 385篇 |
2009年 | 387篇 |
2008年 | 441篇 |
2007年 | 423篇 |
2006年 | 435篇 |
2005年 | 361篇 |
2004年 | 384篇 |
2003年 | 414篇 |
2002年 | 306篇 |
2001年 | 606篇 |
2000年 | 560篇 |
1999年 | 488篇 |
1998年 | 238篇 |
1997年 | 180篇 |
1996年 | 181篇 |
1995年 | 165篇 |
1994年 | 184篇 |
1993年 | 168篇 |
1992年 | 273篇 |
1991年 | 300篇 |
1990年 | 289篇 |
1989年 | 269篇 |
1988年 | 294篇 |
1987年 | 308篇 |
1986年 | 304篇 |
1985年 | 282篇 |
1984年 | 266篇 |
1983年 | 265篇 |
1982年 | 170篇 |
1981年 | 154篇 |
1980年 | 147篇 |
1979年 | 216篇 |
1978年 | 164篇 |
1977年 | 132篇 |
1976年 | 119篇 |
1975年 | 134篇 |
1974年 | 131篇 |
1973年 | 132篇 |
1972年 | 107篇 |
1971年 | 113篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
The conventional wisdom in criminology is that adult onset of offending is a rare event. Closer examination of the extant literature that use official records, however, reveals that an average of 50 percent of adult offenders initiate offending at age eighteen or older. Although criminological research has investigated late onset offending in adolescence, there is little research on adult onset offending and the correlates of adult offending. Using police contact and interview data from the 1942 and 1949 birth cohort data from Racine, WI, this study investigated the correlates of crime for adult onset and persistent offenders. The results show that employment is the only correlate to affect the probability of adult offending differently for previously delinquent and nondelinquent offenders. This article concludes by highlighting the neglect of research on adult offenders, specifically the large percentage of adult onset offenders, and calling for more research on this topic. 相似文献
22.
The individuality of fibres used to provide forensic evidence--not all blue polyesters are the same.
Fibres used in forensic casework suffer from a disadvantage common to other forms of trace evidence--it is not possible to state with absolute certainty that they originate from a specific source. Target fibre studies, population studies and research on 'blocks of colour' have effectively demonstrated the polymorphism of textile fibres (particularly man-made ones) and have shown that when a fibre is believed to have a specific putative source, the chance that it has originated from a different source purely by coincidence is extremely remote. A study by Houck MM (Houck MM, Inter-comparison of unrelated fibre evidence. Forensic Science International 2003; 135: 146-149) has shown that no coincidental matching fibres were recovered from items of clothing examined in 20 unrelated crimes. The study involved over two million comparisons. This work goes a step further, and using the example of blue polyester fibres shows that even within a very narrow segment of the whole general fibre population, many examples of a specific colour/type of man-made fibre taken from random sources can be compared and the chance of any two being the same is very low. These studies should help to show the specificity and value of transferred fibres in providing forensic evidence. 相似文献
23.
Julia M. Whealin Stephenie Davies Anne E. Shaffer Joan L. Jackson Leslie C. Love 《Journal of family violence》2002,17(2):151-165
Unwanted sexual attention (UWSA) encompasses unsolicited verbal comments, gestures, stares, and other noncontact behaviors made regarding one's sexuality and physical appearance. The present study examined the correlates and impact of such UWSA perpetrated toward girls by family members. The first objective of the study was to explore whether family climate is associated with intrafamilial UWSA. This included looking at three types of dysfunctional parenting styles (unaffectionate, unavailable, and patriarchal) as well as exploring the co-occurrence of UWSA by adult and child relatives. The second objective was to then measure the impact of such intrafamilial UWSA on childhood emotional health, after controlling for parenting style and the experience of more traditional forms of child sexual abuse (CSA). Of the 296 university women (mean age = 19) who participated in the study, 70% (N = 206) reported UWSA from a family member prior to age 18. Whereas each dysfunctional parenting style was related to presence of UWSA, a simultaneous multiple regression analysis indicated that two of the parenting styles, patriarchal and parental unavailability, also predicted frequency of nonphysical UWSA within the family. Presence of UWSA from a child relative was significantly correlated with presence of UWSA from an adult relative. Additionally, a hierarchical multiple regression, entering the three parenting styles simultaneously in the first step, childhood sexual abuse in the second step, and familial UWSA in the last step, indicated that the frequency of UWSA by family members significantly predicted poorer childhood mental health when controlling for the other variables. Overall, results indicate that while the specific parenting styles which co-occur with UWSA may be detrimental in their own right, the impact of UWSA on girls appears to be above and beyond that of either parenting styles or CSA. Clinical implications are discussed. 相似文献
24.
25.
26.
RONALD L. SIMONS LESLIE GORDON SIMONS YI‐FU CHEN GENE H. BRODY KUEI‐HSIU LIN 《犯罪学》2007,45(3):481-517
Past research has largely ignored the developmental changes within the child that account for the association between parenting and risk for delinquency. We used structural equation modeling and data from a longitudinal study of several hundred African‐American families to test the contentions of various theories regarding the sociocognitive and emotional factors that mediate the impact of parental behavior on a youth's risk for delinquency. Our findings largely supported the theories. The impact of monitoring/discipline was indirect through low self‐control and acceptance of deviant norms, whereas the effect of hostility/ rejection was indirect through low self‐control, hostile view of relationships, and acceptance of deviant norms. These two dimensions of parenting were no longer related either to affiliation with deviant peers or to conduct problems once the effects of these psychological characteristics were taken into account; the impact of these parenting practices was completely mediated by these four cognitive/affective variables. Contrary to expectation, however, these psychological factors did not mediate any of the relationship between caretaker involvement in antisocial behavior and child conduct problems. 相似文献
27.
28.
29.
Robert H. Dorff 《国际研究展望》2005,6(1):20-34
This paper addresses the relationship between accumulated knowledge and U.S. policy dealing with failed states and terrorism. The central thesis is threefold: (1) that more was known about the possible linkages between failing states and terrorism than appears in pre-9/11 U.S. policies; (2) that since 9/11 some important realignment of knowledge and practice has occurred, but it remains partial and incomplete; and (3) that new knowledge, especially about the policies to sustain and promote legitimate governance, needs to be generated in order to support an effective grand strategy for addressing the threats and challenges of the twenty-first century. The paper recommends such a grand strategy and, in addition to the required new knowledge, a significant reorganization of the U.S. national security policy-making apparatus. International studies curricula appear well suited for contributing to that new knowledge and the practitioners we require. 相似文献
30.