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   4908篇
  免费   65篇
  国内免费   11篇
各国政治   232篇
工人农民   159篇
世界政治   135篇
外交国际关系   178篇
法律   2155篇
中国共产党   136篇
中国政治   1170篇
政治理论   180篇
综合类   639篇
  2024年   38篇
  2023年   156篇
  2022年   11篇
  2021年   63篇
  2020年   42篇
  2019年   28篇
  2018年   39篇
  2017年   44篇
  2016年   43篇
  2015年   54篇
  2014年   61篇
  2013年   280篇
  2012年   266篇
  2011年   654篇
  2010年   413篇
  2009年   379篇
  2008年   388篇
  2007年   275篇
  2006年   287篇
  2005年   213篇
  2004年   251篇
  2003年   178篇
  2002年   142篇
  2001年   123篇
  2000年   92篇
  1999年   81篇
  1998年   7篇
  1997年   31篇
  1996年   10篇
  1995年   5篇
  1994年   30篇
  1993年   33篇
  1992年   28篇
  1991年   32篇
  1990年   27篇
  1989年   38篇
  1988年   31篇
  1987年   28篇
  1986年   27篇
  1985年   8篇
  1984年   9篇
  1983年   6篇
  1981年   4篇
  1980年   4篇
  1979年   5篇
  1978年   3篇
  1977年   3篇
  1976年   4篇
  1973年   4篇
  1967年   2篇
排序方式: 共有4984条查询结果,搜索用时 15 毫秒
201.
本文测量了85例国人胸骨(男52,女33)的全长、柄长、体长、柄最大宽、体最大宽、柄最大厚及体最大厚七个项目,发现所有项目都具有非常显著的性别差异,但两性间重迭率较高,用单项难以准确判定性别。为此,采用 Fisher 判别分析法建立了判定胸骨性别的判别函数,判别率最高达90%。考虑到残缺胸骨的性别鉴定,亦建立了相应的判别函数。与国外研究相比,本文方法判别率较高且更具有实用价值。  相似文献   
202.
203.
204.
The authors evaluated the usefulness of the postmortem biochemical analysis of ionic ratios in different parts of the heart and their relation to cardiac damage caused by chest trauma, as observed by anatomopathologic study. Fifty-nine 59 cases were studied, selected from routine necropsies, and samples were taken from different sites of cardiac tissue. The cause of death was trauma in 40 cases and nontraumatic causes in 19 cases. The object of this study was to analyze the levels of Na+, K+, Ca+2, Mg+2, and Zn+2 in different zones of the heart, and the relationship between intracellular and extracellular ion ratios and the different causes of death and any anatomopathologic alterations observed. The biochemical tests revealed a possible relation between the ionic values and cause of death. Alterations in cell membrane permeability and corresponding modification of the ionic ratios were produced earlier than histologic alterations, which need longer to establish themselves whether or not they follow a traumatic process.  相似文献   
205.
Gene and genotype frequencies in relation to the D3S1358, vWA, FGA, TH01, TPOX, CSF1PO, D5S818, D13S317, and D7S820 loci were determined in a sample of 290 unrelated individuals (204 Caucasians and 86 mulattoes) living in the city of S?o Paulo, Brazil. The sex test Amelogenin was also performed in all subjects from our sample, revealing the expected sex in all instances. Allele frequency data obtained from the analysis of these samples were in the usual range of other population groups with similar racial background. In the sample of Caucasian individuals, panmictic proportions were ruled out in relation to TPOX and CSF1PO loci, but only in the latter was the overall frequency of heterozygotes significantly less than expected. In the sample of mulattoes, Hardy-Weinberg proportions were rejected in relation to FGA and CSF1PO loci, but in no instance were the overall numbers of heterozygotes different from the corresponding expected ones under panmixia. Taking into account all this and also the number of tests performed, the degree of genetic heterogeneity of Brazilian populations, and the critical level reached by the significant results (1% < alpha<5%), the departures from panmixia here observed can be considered to be negligible in altering significantly biologic relationship odds calculated under the assumption of random matings.  相似文献   
206.
This final rule implements a bonus payment, in addition to the amount normally paid under the allowable charge methodology, to physicians in medically underserved areas. For purposes of this rule, medically underserved areas are the same as those determined by the Secretary of Health and Human Services for the Medicare program. Such bonus payments shall be equal to the bonus payments authorized by Medicare, except as necessary to recognize any unique or distinct characteristics or requirements of the TRICARE program, and as described in instructions issued by the Executive Director, TRICARE Management Activity. This rule promotes a reimbursement enhancement to a limited number of physicians designed to increase TRICARE beneficiary access to care.  相似文献   
207.
Allele frequencies for the nine STRs included in the AmpFlSTR Profiler Plus kit (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317 and D7S820) were estimated from a sample of 143 unrelated individuals living in different regions of Greece.  相似文献   
208.
大学生创业能力研究报告   总被引:12,自引:0,他引:12  
大学生的创业能力决定了创业的总体水平和创业成功率。调查显示,尽管大学生创业意愿强烈,但对创业的理解还存在偏差,实际的创业动能并不高,而且创业精神、创新意识、资源获取能力、企业运作和市场知识等创业的核心能力不强。提出创业教育要注重加强针对性的观点。  相似文献   
209.
Behaviors developed in adolescence influence health later in life. The purpose of this study was to investigate the frequency of health care provider's discussion of health behaviors with overweight and non-overweight adolescents and identify demographic and health behaviors related to exercise, hours of television viewing, and weight issues associated with these discussions. A Cross sectional survey of urban adolescents was conducted. Trained interviewers administered surveys over a three month period in 2001 at an urban academic pediatric and adolescent clinic. The 252 adolescents surveyed had a mean age of 15 with 49% categorized as being at risk for overweight/overweight and 51% as normal weight using the CDC percentiles for BMI. While 16% of the adolescents reported that their physician or nurse discussed the amount of television they watched, rates of discussion related to exercise (58%), and weight (54%) were much higher. In multivariate analyses, health care provider discussions with adolescents regarding exercise were more common for overweight (O.R.=2.42, 95% C.I. [1.28–4.57]) and at risk for overweight (O.R.=1.98, 95% C.I. [1.03–3.81]) adolescents, whereas physician discussion of television viewing was not associated with weight. Discussions of weight were more common for female (O.R.=2.18, 95% C.I. [1.21–3.95]), African-American (O.R.=2.53, 95% C.I. [1.40–4.57]), and overweight (O.R.=3.92, 95% C.I. [1.97–7.81]) adolescents. Even after adjusting for weight, race and gender strongly influenced the frequency of discussions about weight in physician offices. Although health care providers frequently address weight and exercise with adolescents, more discussions related to sedentary behaviors such as television viewing may be warranted to address adolescent obesity.Received PhD in Epidemiology from University of California, San Diego. Research interests include smoking prevention and cessation among adolescents and health promotion interventions.Received MD from University of Missouri-Kansas City and MPH from Johns Hopkins University. Research interests include health services research and research in support of measurable, systematic improvements in the quality of medical care.Received medical degree from Christian Medical College, Punjab, India and Master of Public Health from University of Kansas School of Medicine. Research interests include diet and physical activity behaviors, role of the environment in obesity and obesity prevention, especially among children and adolescents.Received MBBS from Allama Iqbal Medical College, Punjab University, Lahore, Pakistan and MPH from University of Kansas Medical Center. Research interests include smoking cessation, database design, implementation, data management and analysis, and use of information technology in health care settings.Director, Cancer Prevention, Control, and Population Sciences, Kansas Cancer Institute. Received MD/MPH from Tulane University and MS from Harvard School of Public Health. Research interests include disparities in healthcare; smoking cessation among underserved populations, specifically African Americans; diet, nutrition, obesity, and physical activity.  相似文献   
210.
邵广侠 《探索》2006,1(5):83-86
无论是社会本位还是知识本位的思想政治教育,从根本上说,都是一种反人性的思想政治教育,因为它们无视人的生命需要。当前,加强人的主体性建设,追求个人的全面而自由发展,已经成为时代的重要主题,以人为本的思想政治教育正是表达了这样一种价值追求和行为标准。以人为本的思想政治教育就是指顺应人性,注重尊重人、关爱人和发展人的教育,其特征主要表现为主体性、生活性、开放性和整合性。  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