全文获取类型
收费全文 | 21723篇 |
免费 | 637篇 |
专业分类
各国政治 | 1058篇 |
工人农民 | 819篇 |
世界政治 | 1948篇 |
外交国际关系 | 963篇 |
法律 | 12153篇 |
中国共产党 | 2篇 |
中国政治 | 120篇 |
政治理论 | 5074篇 |
综合类 | 223篇 |
出版年
2021年 | 120篇 |
2020年 | 287篇 |
2019年 | 352篇 |
2018年 | 496篇 |
2017年 | 553篇 |
2016年 | 628篇 |
2015年 | 404篇 |
2014年 | 465篇 |
2013年 | 2446篇 |
2012年 | 552篇 |
2011年 | 576篇 |
2010年 | 467篇 |
2009年 | 502篇 |
2008年 | 615篇 |
2007年 | 656篇 |
2006年 | 626篇 |
2005年 | 545篇 |
2004年 | 568篇 |
2003年 | 552篇 |
2002年 | 511篇 |
2001年 | 770篇 |
2000年 | 702篇 |
1999年 | 602篇 |
1998年 | 354篇 |
1997年 | 313篇 |
1996年 | 268篇 |
1995年 | 259篇 |
1994年 | 304篇 |
1993年 | 282篇 |
1992年 | 395篇 |
1991年 | 421篇 |
1990年 | 373篇 |
1989年 | 391篇 |
1988年 | 368篇 |
1987年 | 365篇 |
1986年 | 379篇 |
1985年 | 363篇 |
1984年 | 320篇 |
1983年 | 339篇 |
1982年 | 279篇 |
1981年 | 263篇 |
1980年 | 194篇 |
1979年 | 263篇 |
1978年 | 183篇 |
1977年 | 157篇 |
1976年 | 142篇 |
1975年 | 132篇 |
1974年 | 157篇 |
1973年 | 122篇 |
1972年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
121.
122.
P J Karhunen H Brummer-Korvenkontio H Laaksonen M L Kantanen P Arstila P Leinikki 《Journal of forensic sciences》1992,37(5):1261-1268
In order to cooperate with voluntary screening programs aimed at the surveillance of the HIV epidemic in Finland, we have studied medicolegal autopsies for HIV antibodies since 1986 using an enzyme immunoassay on postmortem sera. The investigation covered 47.4% and 39.2%, respectively, of all deaths under the age of 65 years in the metropolitan areas of Helsinki and Turku--two cities on the densely populated southern coast of Finland from which most HIV infections have thus far been detected. Nine HIV-positive cases (0.12%) were detected among the 7305 medicolegal autopsies tested in 1986 to 1990. This figure is higher than the prevalence of 0.01 to 0.03% in voluntary screening programs for the general population would suggest. Seven of our cases had previously tested positive, and two were previously unknown cases, indicating that people at high risk are clustered in the medicolegal autopsy series. Of the six cases in an early stage of infection, three committed suicide suggesting the importance of HIV-screening in suicide cases in tracing symptomless HIV carriers. Five of the cases were detected in 1990, a year when the number of new HIV infections had more than doubled compared to the previous two years. This suggests that testing of medicolegal autopsies as surrogate tests for the population gives useful information even in low-prevalence areas like Finland. Such testing has none of the ethical problems of many other back-up surveys, and may be particularly sensitive to early changes in epidemiology. 相似文献
123.
The psychological assessment battery is an integral part of the selection process used to select patrol officer applicants.
Unlike all other procedures used in the selection process, the psychological assessment has not been adequately validated.
The purpose of this study was an attempt to provide validation data for a psychological assessment battery. The battery consisted
of the Nelson-Denny, Shipley-Hartford, MMPI, and the Motivational Analysis Test (MAT). Performance measures included various
measures of training academy performance and field training performance. A stepwise regression and MANOVA/Discriminant Analysis
indicated that the psychological tests did predict performance, although an exact predictive equation could not be developed
due to the high intercorrelations between predictor variables.
This research was sponsored in part by a grant from the School of Applied Arts and Technology, Southwest Texas State University. 相似文献
124.
The conflict and animosity that sometimes accompanies child custody disputes can give rise to the propagation of allegations of child sexual abuse. To characterize the magnitude of the problem, the present study attempted to determine whether and to what extent child sexual abuse allegations predominate in family court litigation. The entire one-year caseload of a county family court docket was systematically reviewed and coded. Methodical evaluation of 603 family court files yielded base rates of pertinent allegations and other information profiling the cases. The findings did not support the contention that sexual abuse allegations are commonplace in child custody disputes. Sexual abuse allegations were made in 2% of cases in which custody or access was contested and in only 0.8% of the cases overal. Implications of the findings for future research were discussed.The authors gratefully acknowledge the assistance of the Honorable William R. Campbell and Barbara Scott, Clerk of Court for the South Carolina Fifth Judicial Circuit, as well as the contributions of Angie Newton, Frank Robinson, and Kimberly Ellis in the data collection process. 相似文献
125.
Michael Levine 《Crime, Law and Social Change》1993,20(1):1-12
“I Volunteer to Kidnap Ollie North”, is an exercise in following our government's sometimes criminal, often bizarre and always hypocritical actions in the war on drugs during the Reagan-Bush years to their logical conclusion. The Supreme Court has indicated in its June, 1992 decision in U.S. v Machain, that American law enforcement officers can now enter the sovereign territories of other nations to legally abduct violators of U.S. drug laws. Iran immediately proclaimed that they had the same right for violations of Islamic law. What might happen if kidnapping becomes a recognized “tool” of international law enforcement? What prominent Americans might wake up in South American jails with bags over their heads? 相似文献
126.
Federal transportation officials assert that labor protections in the Urban Mass Transportation Act inhibit the propensity of local transit agencies to contract with private firms for services. The authors present results from a survey of a large sample of transit managers and econometric analysis to support their conclusion that labor protections do not appear to reduce the incidence of contracting. The labor protections, however, may be costly to transit management in other ways. The authors recommend actions, aside from repeal of labor protections, to increase contracting by local transit agencies. 相似文献
127.
128.
129.
130.