全文获取类型
收费全文 | 9437篇 |
免费 | 262篇 |
专业分类
各国政治 | 576篇 |
工人农民 | 363篇 |
世界政治 | 650篇 |
外交国际关系 | 425篇 |
法律 | 5385篇 |
中国政治 | 58篇 |
政治理论 | 2171篇 |
综合类 | 71篇 |
出版年
2020年 | 104篇 |
2019年 | 124篇 |
2018年 | 174篇 |
2017年 | 204篇 |
2016年 | 212篇 |
2015年 | 154篇 |
2014年 | 183篇 |
2013年 | 1135篇 |
2012年 | 180篇 |
2011年 | 207篇 |
2010年 | 200篇 |
2009年 | 199篇 |
2008年 | 240篇 |
2007年 | 240篇 |
2006年 | 253篇 |
2005年 | 214篇 |
2004年 | 220篇 |
2003年 | 234篇 |
2002年 | 199篇 |
2001年 | 325篇 |
2000年 | 270篇 |
1999年 | 259篇 |
1998年 | 142篇 |
1997年 | 110篇 |
1996年 | 102篇 |
1995年 | 116篇 |
1994年 | 113篇 |
1993年 | 112篇 |
1992年 | 153篇 |
1991年 | 196篇 |
1990年 | 194篇 |
1989年 | 182篇 |
1988年 | 186篇 |
1987年 | 202篇 |
1986年 | 195篇 |
1985年 | 183篇 |
1984年 | 170篇 |
1983年 | 151篇 |
1982年 | 115篇 |
1981年 | 114篇 |
1980年 | 86篇 |
1979年 | 137篇 |
1978年 | 112篇 |
1977年 | 92篇 |
1976年 | 74篇 |
1975年 | 92篇 |
1974年 | 110篇 |
1973年 | 98篇 |
1972年 | 64篇 |
1971年 | 64篇 |
排序方式: 共有9699条查询结果,搜索用时 15 毫秒
81.
This study examined crime and violence against abortion clinics, testing elements of several theories that may help explain the variation of such attacks. The study theoretically and methodologically improved upon the prior research on abortion-related crime and violence. Theoretically, it investigated previously unexamined hypotheses from the social movement literature that may be relevant to this type of behavior. Methodologically, it used more careful measures for several variables, employed unique and heretofore ignored data bases, and examined hundreds of criminal acts across several types of crime (e.g., violence, vandalism, and harassment) directed at abortion clinics. Employing robust logistic regression and correcting for clustering of clinics by state, the study investigated the cross-sectional effects of state-level cultural and structural characteristics on anti-abortion crimes against clinics and staff. Results indicated that some crimes against clinics are more likely in areas where female empowerment is weaker, female victimization is more tolerated, and the anti-abortion movement has failed to reduce abortions. 相似文献
82.
Ernst-Rainer H?nes 《Natur und Recht》2010,19(1):629-635
Der Wald hat für uns ?konomische, ?kologische, soziale und kulturelle Bedeutung. Leider
ist in letzter Zeit die kulturelle Bedeutung im Vergleich zur ?kologischen Bedeutung ins politische
Abseits geraten. Nun will man das seit 1975 geltende Bundeswaldgesetz novellieren. Dabei sollte zur besseren
Berücksichtigung des Denkmalschutzes bei der Definition des Waldes klargestellt werden, dass Park-,
Garten- und Friedhofsanlagen kein Wald im Sinne des Bundeswaldgesetzes sind. Die Bedeutung des Waldbodens
als Archiv der Natur- und Kulturgeschichte muss betont werden. Nicht zuletzt wegen der angestrebten Eintragung
der Deutschen Buchenw?lder in die Liste des Erbes der Welt muss zum Ausdruck kommen, dass Deutschland
die europ?ischen und internationalen Bemühungen zum Erhalt des Kultur- und Naturerbes wie das
übereinkommen zum Schutz des Kultur- und Naturerbes der Welt von 1972 unterstützt. 相似文献
83.
The public's perception of the police is important because it is linked to several important outcomes, including compliance and cooperation with police. Long recognized as being important, research has investigated the factors associated with citizens' evaluations of the police. The way police do their jobs, in addition to what they accomplish, has recently emerged as being a significant determinant of citizens' evaluations of police. What remains largely unexamined is whether this relationship varies across distinct types of contacts between the police and citizens. The current study estimated the effects of citizens' perceptions of procedural justice on overall ratings of officer performance across three types of police–citizen encounters. Results showed that procedurally fair treatment is the most important predictor of citizens' evaluations. 相似文献
84.
85.
Postmortem examination of a former professional basketball player revealed an abnormal heart, most notably a single coronary artery. The literature on single coronary arteries is briefly reviewed, and the possible mechanism which caused the patient's condition is considered. This case is particularly unusual because of the patient's profession, which is so physically demanding. 相似文献
86.
87.
J B Kempton A Sirignano D H DeGaetano P J Yates W F Rowe 《Journal of forensic sciences》1992,37(6):1534-1540
The fingernail ridge patterns of a pair of identical twins were compared to each other, their parents, and an unrelated subject. The patterns of the twins' nails showed regions of strong similarity but were distinguishable from one another. Fewer similarities were found when comparing the nails to those of the parents and the unrelated control. The twins were shown to be monozygotic by means of DNA profiling. This therefore represents the first demonstration of unique fingernail ridge patterns in subjects shown conclusively to be identical twins. When the fingernail ridge patterns were examined with a scanning electron microscope, the backscattered electron (BEI) images were found to have superior contrast when compared to the secondary electron (SEI) images. 相似文献
88.
89.
John Kerbs Ph.D. Kyubeom Choi Ph.D. Stephen Rollin Ed.D. Robert Gutierrez Ed.D. Isabelle Potts J.D. Jayme Harpring Ph.D. Alia H. Creason Ph.D. Tam Dao M.S. 《American Journal of Criminal Justice》2005,30(1):121-141
Although past research has developed scales for the incidence, prevalence, and fear of student-on-student victimization (SSV),
little is known about the scaling of perceived risk (i.e., the cognitive appraisal of the chances of experiencing SSV). Hence,
this study examined self-report survey data for the perceived risk of SSV as measured in the Adolescent Index for School Safety
(AISS). Children in grades 7 through 10 (n=337) in a single Florida public school completed the AISS. Factor analyses using
Maximum Likelihood Estimation with Oblimin Rotation identified nine unique factors for perceived risk. Reliability analyses
found standardized Cronbach Alphas that ranged from .64 to .91, and seven out of the nine identified scales were above .80,
which suggested good to excellent internal consistency. Future research should examine the content validity, construct validity,
and predictive validity for the AISS and other self-report surveys of SSV dynamics.
This publication was made possible by a grant [#97-MU-FX-KO12 (S-l)] from the Office of Juvenile Justice and Delinquency Prevention
(O.J.J.D.P.), United States Department of Justice (U.S.D.O.J.). This grant is administered through the Hamilton Fish National
Institute on School and Community Violence at George Washington University. This specific study was developed and implemented
by staff at: 1) East Carolina University’s Department of Criminal Justice; and 2) Florida State University’s Center for Educational
Research and Policy Studies. All points of view and opinions in this paper are those of the authors and do not necessarily
represent the official position or policies of East Carolina University, Florida State University, the Hamilton Fish National
Institute on School and Community Violence, the O.J.J.D.P., or the U.S.D.OJ. The authors would also like to thank Dr. Bill
Doerner and Jennifer Jolley for their support, editorial feedback, and insightful comments regarding earlier drafts of this
paper. 相似文献
90.
H C Modlin 《The Bulletin of the American Academy of Psychiatry and the Law》1990,18(2):153-162
This paper concerning the last 87 malpractice cases referred to the Department of Psychiatry and Law, Menninger Clinic, includes 57 suits against mental health practitioners and/or institutions, and 30 nonpsychiatric suits against general hospitals, surgeons, obstetricians, etc. A patient was available for interview in only 12 percent of the psychiatric cases; in 88 percent we reviewed medical records and consulted with attorneys. In the psychiatric cases the crucial question was whether a generally accepted standard of care was breached. The inherent problems of applying appropriate criteria to standards of care by practitioners and institutions are discussed. In half the psychiatric cases we found no significant deviation from acceptable clinical performance; in half we concluded that negligent practice had occurred. We did see a litigant for evaluation in 90 percent of the nonpsychiatric cases. The main issue involving them concerned harm or disability related to presumed negligence by medical personnel. How we evaluate such cases and apply disability criteria is discussed. 相似文献