全文获取类型
收费全文 | 14191篇 |
免费 | 474篇 |
专业分类
各国政治 | 526篇 |
工人农民 | 601篇 |
世界政治 | 1042篇 |
外交国际关系 | 615篇 |
法律 | 8121篇 |
中国共产党 | 36篇 |
中国政治 | 167篇 |
政治理论 | 3381篇 |
综合类 | 176篇 |
出版年
2021年 | 90篇 |
2020年 | 194篇 |
2019年 | 205篇 |
2018年 | 323篇 |
2017年 | 354篇 |
2016年 | 396篇 |
2015年 | 305篇 |
2014年 | 326篇 |
2013年 | 1555篇 |
2012年 | 323篇 |
2011年 | 389篇 |
2010年 | 316篇 |
2009年 | 405篇 |
2008年 | 441篇 |
2007年 | 464篇 |
2006年 | 449篇 |
2005年 | 415篇 |
2004年 | 405篇 |
2003年 | 342篇 |
2002年 | 359篇 |
2001年 | 437篇 |
2000年 | 407篇 |
1999年 | 328篇 |
1998年 | 227篇 |
1997年 | 180篇 |
1996年 | 188篇 |
1995年 | 170篇 |
1994年 | 190篇 |
1993年 | 183篇 |
1992年 | 247篇 |
1991年 | 305篇 |
1990年 | 260篇 |
1989年 | 253篇 |
1988年 | 258篇 |
1987年 | 257篇 |
1986年 | 271篇 |
1985年 | 243篇 |
1984年 | 203篇 |
1983年 | 205篇 |
1982年 | 144篇 |
1981年 | 177篇 |
1980年 | 140篇 |
1979年 | 148篇 |
1978年 | 127篇 |
1977年 | 102篇 |
1976年 | 96篇 |
1975年 | 83篇 |
1974年 | 87篇 |
1973年 | 103篇 |
1969年 | 67篇 |
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
261.
H C Lee E M Pagliaro K M Berka N L Folk D T Anderson G Ruano T P Keith P Phipps G L Herrin D D Garner 《Journal of forensic sciences》1991,36(2):320-330
Deoxyribonucleic acid (DNA) was isolated from a number of spongy and compact human bone tissue specimens, and the yield was estimated on a "per milligram of starting tissue" basis. DNA was, in addition, isolated from a number of corresponding blood and bone tissue specimens. Spectrophotofluorometry and ethidium bromide visualization on minigels were used to estimate the quantity and degree of degradation of DNA. The DNA from several blood-bone pairs is shown to give concordant restriction fragment length polymorphism (RFLP) typing results by two different typing protocols with five different single-locus probes. DNA from several additional blood-bone pairs is shown to give concordant results for human leucocyte antigen (HLA)-DQ alpha phenotypes following polymerase chain reaction (PCR) amplification and hybridization to specific allele-specific oligonucleotide (ASO) probes, and for the variable numbers of tandem repeats (VNTR) length polymorphisms 3' to the human apolipoprotein B (APOB) gene following PCR amplification with specific primers and analysis of the products by electrophoresis and ethidium bromide visualization. 相似文献
262.
263.
Ronald Roesch Stephen L. Golding Valerie P. Hans N. Dickon Reppucci 《Law and human behavior》1991,15(1):1-11
Social scientists have increasingly become involved in the submission of amicus curiae or friend of the court briefs in legal cases being decided by state and federal courts. This increase has triggered considerable debate about the use of briefs to communicate relevant social science research. This article evaluates the strengths and weaknesses of various methods of summarizing social science research for the courts. It also reviews the procedures for submitting briefs developed by the American Psychology-Law Society which, in collaboration with the American Psychological Association, has submitted its first brief inMaryland v. Craig, a case recently decided by the U.S. Supreme Court.The authors wish to thank James Ogloff, Kathy Roesch, and Claudia Worrell for their comments on an earlier draft 相似文献
264.
265.
J Arboleda-Florez H L Holley 《The Bulletin of the American Academy of Psychiatry and the Law》1991,19(2):173-183
The more flagrant aspects of Antisocial Personality Disorder (APD), particularly criminality, are thought to diminish or "burnout" after age 30. However, empirical evidence of burnout in clinically defined groups is lacking. This study explores burnout in a cohort of forensic psychiatric patients, aged 41 to 67, with clinically diagnosed DSM-III APD (N = 39). Conviction data revealed that criminality did appear to decline from age 27 onward, but not in a straightforward manner. Further, a significant portion of the cohort remained criminally active throughout most of their adult lives. Age did not appear to interact with crime class. 相似文献
266.
267.
George Washington University Medical Center's Policy on decisionmaking by pregnant patients is being widely circulated by the ACLU; copies of the Policy can be obtained by calling the American Civil Liberties Union Reproductive Freedom Project. There is, of course, much disagreement over the details of the Policy; not everyone will agree with its underlying philosophy favoring maternal rights. Nevertheless, there does seem to be a consensus that wherever possible these conflicts should be resolved in accordance with previously adopted policies rather than by the courts on an ad hoc basis. Had the Policy been in place in 1987, the Carder case would probably not have been submitted to a judge in the first place, nor would Angela Carder have been forced to undergo a Caesarean section. All hospitals should consider adopting a maternal-fetal conflict policy, and those that do so should be aware of the George Washington University Medical Center Policy, whether or not they agree with its provisions. Whatever policy each hospital ultimately develops should be integrated with decisionmaking and informed consent policies already in place. The formulation and implementation of such a policy, reflecting the hospital's legal and ethical obligations to its pregnant patients, will go a long way towards preventing unnecessary resort to the courts. 相似文献
268.
Prepared as a response to Frey and Eichenberger's Anomalies in Political Economy. We thank Gordon Tullock for helpful discussions. This work was partially supported by the Taylor Experimental Laboratory at Washington University. 相似文献
269.
James L. Payne 《Public Choice》1991,70(1):71-82
It is widely believed that electoral pressures cause legislators to favor government spending programs. This electoral theory of spending is shown to encompass two core hypotheses: (1) the electoral consequences hypothesis, which states that support for spending programs improves the representative's electoral showing; and (2) the legislator insecurity hypothesis, which states that greater electoral insecurity leads representatives to be more in favor of spending programs. A test of these ideas using spending scores for U.S. representatives in 1986 finds that neither hypothesis is supported by the data. 相似文献
270.
When dying is all that awaits them, more and more people are choosing certain death now rather than uncertain life on medical support systems. But the decision seldom comes easy, as a Newsweek reporter discovers during three weeks with the doctors, nurses, patients and families in an intensive-care ward. A best-selling guide to suicide fires debate over when it is right to let life go--and who should make that choice when the patient no longer can. 相似文献