全文获取类型
收费全文 | 15503篇 |
免费 | 458篇 |
专业分类
各国政治 | 831篇 |
工人农民 | 560篇 |
世界政治 | 1358篇 |
外交国际关系 | 742篇 |
法律 | 8570篇 |
中国政治 | 104篇 |
政治理论 | 3685篇 |
综合类 | 111篇 |
出版年
2023年 | 82篇 |
2021年 | 83篇 |
2020年 | 193篇 |
2019年 | 274篇 |
2018年 | 357篇 |
2017年 | 353篇 |
2016年 | 386篇 |
2015年 | 242篇 |
2014年 | 349篇 |
2013年 | 1888篇 |
2012年 | 381篇 |
2011年 | 442篇 |
2010年 | 337篇 |
2009年 | 379篇 |
2008年 | 449篇 |
2007年 | 505篇 |
2006年 | 434篇 |
2005年 | 365篇 |
2004年 | 422篇 |
2003年 | 399篇 |
2002年 | 356篇 |
2001年 | 575篇 |
2000年 | 555篇 |
1999年 | 411篇 |
1998年 | 258篇 |
1997年 | 227篇 |
1996年 | 206篇 |
1995年 | 182篇 |
1994年 | 173篇 |
1993年 | 172篇 |
1992年 | 293篇 |
1991年 | 308篇 |
1990年 | 313篇 |
1989年 | 287篇 |
1988年 | 301篇 |
1987年 | 310篇 |
1986年 | 267篇 |
1985年 | 237篇 |
1984年 | 231篇 |
1983年 | 214篇 |
1982年 | 170篇 |
1981年 | 159篇 |
1980年 | 120篇 |
1979年 | 163篇 |
1978年 | 118篇 |
1977年 | 93篇 |
1975年 | 88篇 |
1974年 | 111篇 |
1973年 | 110篇 |
1972年 | 81篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
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
112.
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
113.
114.
115.
116.
117.
Some features of early child care are more prominent in Norway than in other countries, such as emphasis on the outdoor environment. Of general relevance and interest is the form of day care provided by forest day-care centers. Three ideas form the development of these centers placed in wild areas. First, throughout history, Norwegians have had a close attachment to nature and some parents want to provide their children with outdoor experiences at an early age. Second, urging children to play outdoors characterizes the image many parents have of a happy, healthy childhood. Third, provision of day care for children has always been restricted in western countries, forcing parents to invent types of service that can become part of an ecological system that promotes healthy development.The forest day-care centers developed recently represent a supplement to the wide typology of child care in the 21st century. The article outlines the connections between these ideas in general European and western history and Norwegian history and presents debate and decisions about a question dating from the last half of the 1980s. It concludes that the forest day-care centers are perhaps only a modern form of the original kindergarten concept, which started in Europe and America as gardens for children not gardens of children. 相似文献
118.
Sherri Messimer James Swain Phillip Farrington John Evans 《The Journal of Technology Transfer》1994,19(3-4):87-99
This paper describes an effort by industry and university partners to centralize manufacturing decision making through the development of generic simulation tools. This ongoing, cooperative process improvement initiative between the Industrial and Systems Engineering faculty at the University of Alabama in Huntsville (UAH) and Chrysler’s Huntsville Electronics Division (HED) permits the involved faculty to broaden their experience and technical expertise in electronics fabrication, while the industry partner benefits from the transfer of technical knowledge and advanced analysis methodologies from the university. The focus of the project is the definition of generic electronic manufacturing models that can be easily defined and implemented through common user-oriented interfaces, allowing users who are not familiar with simulation and simulation languages to address the needs of their particular functional areas. 相似文献
119.
Deoxyribonucleic acid (DNA) typing of ribosomal ribonucleic acid (rRNA) genes was performed with a polymerase chain reaction (PCR) assay for species identification. A variable region of the 28S ribosomal RNA gene was amplified with primers complementary to flanking sequences phylogenetically well conserved. The products of twelve animal DNAs (human, Japanese monkey, dog, cattle, pig, cat, rabbit, mouse, rat, chicken, frog, and fish) were separated by polyacrylamide gel electrophoresis, each revealing a few bands ranging from 150 to 100 base pairs. The band patterns obtained from each DNA sample differed in number and size, which indicates the applicability of the method to species identification. Samples containing either as little as 1 pg of DNA or degraded DNA of 0.2 to 0.5 kb in length were able to give detectable bands. Postmortem human tissue DNAs were tested as an example. They showed a pattern identical to the human control one, which was distinct from those of the other animals examined. 相似文献
120.
Social scientists have theorized about the cycle of domestic violence in family abuse. Little research has addressed dating violence as a consequence to the experience of domestic violence by children. This article deals with the self-reported experience of dating violence by high school students from abusive and nonabusive households. A survey was conducted of 1,353 students in a rural area of North Dakota. Results indicated that students from abusive households showed significantly higher incidence of dating violence than those from homes where no abuse was evident. However, less than one in five of the students from abusive home reported dating violence, providing little support for the cycle of violence hypothesis. Students from abusive homes viewed violence as negatively as students from nonabusive homes. Thus, while there are significant differences between the two groups, there are also important similarities. Although there is apparently a greater risk of dating violence among students who have experienced violence at home, these data do not support the idea of an inescapable pattern of violence among adolescents who have experienced violence themselves. 相似文献