全文获取类型
收费全文 | 20950篇 |
免费 | 554篇 |
专业分类
各国政治 | 835篇 |
工人农民 | 820篇 |
世界政治 | 1692篇 |
外交国际关系 | 742篇 |
法律 | 12721篇 |
中国共产党 | 2篇 |
中国政治 | 97篇 |
政治理论 | 4400篇 |
综合类 | 195篇 |
出版年
2020年 | 255篇 |
2019年 | 316篇 |
2018年 | 410篇 |
2017年 | 472篇 |
2016年 | 505篇 |
2015年 | 338篇 |
2014年 | 412篇 |
2013年 | 2012篇 |
2012年 | 492篇 |
2011年 | 543篇 |
2010年 | 420篇 |
2009年 | 477篇 |
2008年 | 534篇 |
2007年 | 557篇 |
2006年 | 544篇 |
2005年 | 461篇 |
2004年 | 481篇 |
2003年 | 505篇 |
2002年 | 449篇 |
2001年 | 831篇 |
2000年 | 770篇 |
1999年 | 627篇 |
1998年 | 340篇 |
1997年 | 289篇 |
1996年 | 246篇 |
1995年 | 250篇 |
1994年 | 292篇 |
1993年 | 263篇 |
1992年 | 435篇 |
1991年 | 454篇 |
1990年 | 434篇 |
1989年 | 438篇 |
1988年 | 428篇 |
1987年 | 441篇 |
1986年 | 417篇 |
1985年 | 410篇 |
1984年 | 348篇 |
1983年 | 372篇 |
1982年 | 291篇 |
1981年 | 279篇 |
1980年 | 215篇 |
1979年 | 290篇 |
1978年 | 195篇 |
1977年 | 164篇 |
1976年 | 157篇 |
1975年 | 142篇 |
1974年 | 171篇 |
1973年 | 142篇 |
1972年 | 126篇 |
1971年 | 113篇 |
排序方式: 共有10000条查询结果,搜索用时 15 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.
A dissecting intramural haematoma of the coronary artery is an infrequent cause of sudden and unexpected death. Most cases are women and in a significant number of these women, the haematoma occurred at term to 80 days postpartum. Because the intimal rupture and communication with the lumen were not found in most of the cases, the site of rupture has been considered to be a vasa vasorum. The authors report on a case of one woman who was at a later postpartum period (106 days). The microscopic finding of the dissected coronary artery revealed two intimal tears in a section. The case showed that the dissecting intramural haematoma of the coronary artery is caused not only by the rupture of the vasa vasorum but also by the rupture of the intima. 相似文献
124.
125.
1. The indications such as the place of finding, the identification of clothes or other personal items, represent only the first step towards the identification of a corpse. 2. An identification based on medical data, other than dental, is often possible, more often than it is believed. 3. The forensic pathologist plays a double role in the case of such an identification: a) in the phase of the inquiry, he must contact the investigators and the families to explain his wishes and the different possibilities of identification. b) he must use the gathered information in the appropriate way. 4. It would be desirable to compose some statistical tables of the various medical elements useful for the identification (mutilations, surgical operations, etc...). We present six cases of identification in our practice. 相似文献
126.
John T. Super Ph.D. Theodore H. Blau Ph.D. Charles B. Wells A.A. 《Journal of Police and Criminal Psychology》1995,10(4):41-52
The purpose of this investigation was to identify inmate personal and demographic data that may be used to further define
or profile persons with a greater likelihood of being at risk for serving a jail sentence. This study was explorative. The
survey administration was similar in format to that conducted by the U.S. Department of Justice. Chaplains were used as survey
proctors. Pilot studies were conducted to determine the suitability of survey content. Surveys consisted of 172 items. Subjects
included four hundred inmates: males comprised 88.75 percent of the sample, Caucasians 58.25 percent, Blacks 37 percent, Hispanics
3.25 percent and other 1.5 percent of the sample. Respondents ranged in age from 15 to 64 years with an average age of 30.3
years. Less than two percent of the contacted inmates refused participation in the survey. Results are presented for demographic
data, select legal/criminal data, select drug and alcohol use data, employment data, health, parent/family data, education
data, social data, and “other”. 相似文献
127.
128.
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
129.
130.