首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3187篇
  免费   66篇
各国政治   156篇
工人农民   80篇
世界政治   204篇
外交国际关系   108篇
法律   2209篇
中国共产党   1篇
中国政治   24篇
政治理论   448篇
综合类   23篇
  2020年   45篇
  2019年   35篇
  2018年   38篇
  2017年   49篇
  2016年   63篇
  2015年   31篇
  2014年   50篇
  2013年   261篇
  2012年   72篇
  2011年   80篇
  2010年   51篇
  2009年   53篇
  2008年   73篇
  2007年   91篇
  2006年   86篇
  2005年   94篇
  2004年   98篇
  2003年   93篇
  2002年   99篇
  2001年   178篇
  2000年   135篇
  1999年   87篇
  1998年   40篇
  1997年   23篇
  1996年   25篇
  1995年   24篇
  1994年   28篇
  1993年   28篇
  1992年   71篇
  1991年   75篇
  1990年   65篇
  1989年   95篇
  1988年   89篇
  1987年   79篇
  1986年   83篇
  1985年   75篇
  1984年   40篇
  1983年   47篇
  1982年   22篇
  1981年   36篇
  1980年   26篇
  1979年   32篇
  1978年   26篇
  1977年   31篇
  1975年   34篇
  1974年   31篇
  1973年   33篇
  1972年   35篇
  1971年   25篇
  1969年   24篇
排序方式: 共有3253条查询结果,搜索用时 15 毫秒
891.
In a questionnaire study of 883 high school students, subjects were asked the extent to which their parents criticized them for 18 criticizable behaviors or attitudes. Over 50% of the respondents reported being criticized for being disobedient, lazy, and messy—issues central to family life. Further analyses indicated a relationship between perceived criticism and self-image. The more criticism the teenager perceived for a specific behavior or attitude (e.g., being selfish), the more likely that teenager was to perceive himself/herself as being that way. The differential impact of criticism in the context of parental rejection was also explored.Received M.D. from Rush Medical College. Research interests are birth order and adolescence.Received Ph.D. from the University of Chicago. Research interests are adolescence and psychotherapy.  相似文献   
892.
ABSTRACT

This article examines the growing insecurity for the Korean self-employed who were once responsible for a large proportion of domestic service operations. Since the 1980s, changing regional and domestic economic circumstances, the restructuring of regional and chaebol manufacturing operations and liberalisation of the domestic service economy had led to enterprise diversification into the distributive sectors and the systematisation of the domestic service economy. Conducting a historical analysis of service sector development and decomposing the Korean Economically Active Population survey (1989–2011), this article charts the process of Korea’s distributive sector development and its effect on the self-employed. It argues that chaebol systematisation of Korea’s service sector consolidated the domestic economy after 1997 and exerted pressure on the country’s self-employed. Large businesses formalised the service sector, displaced the self-employed, and instead generated mostly non-regular wage work, proletarianising a significant segment of the service workforce.  相似文献   
893.
In many countries forensic odontologists are members of the Disaster Victim Identification (DVI) team. As part of their post mortem (PM) tasks work on the incident site may include securing and preserving the dental material and evidence before transport to the mortuary. In the autopsy room the main aim is to register the PM dental status. Photographs and radiographs are essential documentations in addition to a conventional registration of the dental status. Abbreviations in the registration may be used if agreed with the ante mortem (AM) team. Dental age estimation may be an aid in the sorting process and especially in victims without previous dental treatment. Interpol has a form set as part of their DVI manual. Forensic odontologists working in pairs and checking each other will act as quality assurance (QA) as suggested by International Organization for Forensic Odonto-Stomatology (IOFOS). Direct entry into the computer program as part of the registration in the autopsy room may save time and manpower.  相似文献   
894.
The authors describe principles, methods and staging of molecular-genetic identification of hostages killed in the Beslan terroristic act. Cases when it was impossible to identify person definitely are explained. Precise staging of the expert investigation is of key importance.  相似文献   
895.
Gunshot fractures in flat bones, bullet defects in the continuum were studied in experiment. The laws of gunshot fracture formation were formulated. In far distance, bullet has a direct and radial blow action. The direct blow induces comminution and disintegration of the bone tissue with dislocation of bone fragments; radial blow potentiates bone destruction. Morphological characteristics of gunshot fractures of flat bones depend on the force of the direct and radial impact action and can be used for estimation of the far shot distance, kinetic energy and shape of the head of the shell.  相似文献   
896.
A 96-channel microfabricated capillary array electrophoresis (muCAE) device was evaluated for forensic short tandem repeat (STR) typing using PowerPlex 16 and AmpFlSTR Profiler Plus multiplex PCR systems. The high-throughput muCAE system produced high-speed <30-min parallel sample separations with single-base resolution. Forty-eight previously analyzed single-source samples were accurately typed, as confirmed on an ABI Prism 310 and/or the Hitachi FMBIO II. Minor alleles in 3:1 mixture samples containing female and male DNA were reliably typed as well. The instrument produced full profiles from sample DNA down to 0.17 ng, a threshold similar to that found for the ABI 310. Seventeen nonprobative samples from various evidentiary biological stains were also correctly typed. The successful application of the muCAE device to actual forensic STR typing samples is a significant step toward the development of a completely integrated STR analysis microdevice.  相似文献   
897.
Allelic frequencies of 15 short tandem repeats (STR) markers (CSF1PO, FGA, THO1, TPOX, VWA, D3S11358, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, D21S11, D19S433 and D2S1338) were determined using the AmpFl STR Identifiler PCR Amplification Kit in Puerto Rican American individuals (N=205) from Massachusetts. The FGA, D18S51 and D2S1338 loci had a high power of discrimination (PD) with values of 0.967, 0.965 and 0.961, respectively. Significant deviations from the Hardy-Weinberg (HW) equilibrium were not detected. An important genetic contribution of Caucasian European (76.4%) was detected in Puerto Rican Americans. However, comparative analysis between Puerto Rican American and other neighboring populations from United States mainly with African and Caucasian Americans, revealed significant differences in the distribution of STR markers. Our results are important for future comparative genetic studies of different American ethnic groups, in particular a cultural group called Hispanic-Americans and should be helpful for forensic and paternity testing.  相似文献   
898.
The current study found that African American residents of Oxford House (OH) used Narcotics Anonymous (NA) at high rates, and that both OH and NA strongly contributed to abstinent social networks. Having siblings and other family members in one's network predicted substance use among network members, whereas spouses, parents, and children did not have an effect on the rate of substance use. These findings suggest that OH and NA may be effective sources of abstinent social support for African Americans recovering from substance abuse. However, family members are well represented in the support networks of African Americans in OH.  相似文献   
899.
This study investigated ethnic and gender differences in reported resource losses and gains for recovering substance abusers living in Oxford Houses (OH). Participants (n = 829) completed a version of Hobfoll's (1998) Conservation of Resources (COR) Evaluation. Results indicated significant individual differences in resources, based on gender, ethnicity, and the length of OH residential stay. Men reported fewer resource gains and losses than women. With respect to ethnicity, African-Americans reported greater gains and losses in resources than European-Americans. Individuals with less time in an OH also reported having experienced more losses in the past 3 months.  相似文献   
900.
Citizen participation in research may include involvement in generating original ideas, planning appropriate designs, collecting data, and helping to implement interventions. Unfortunately, little is known about the attitudes of the community members who participate in such research processes. In the present exploratory study, a team of community members (4 men, 3 women; age > 30 years old) who were employed as investigator research associates to evaluate an innovative substance abuse recovery home were asked for their perspectives about their involvement in the research effort. Findings indicated that these community members felt their participation was a positive experience. Moreover, while their understanding and sense of participation in the research process increased, their identification and affiliation with their support organization was not reduced. Results imply that there is a need to better understand how citizen members of community organizations are affected by their involvement in the research process.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号