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   427篇
  免费   22篇
各国政治   24篇
工人农民   58篇
世界政治   38篇
外交国际关系   22篇
法律   207篇
中国政治   5篇
政治理论   90篇
综合类   5篇
  2023年   7篇
  2022年   2篇
  2021年   3篇
  2020年   6篇
  2019年   14篇
  2018年   21篇
  2017年   16篇
  2016年   15篇
  2015年   15篇
  2014年   11篇
  2013年   69篇
  2012年   18篇
  2011年   10篇
  2010年   12篇
  2009年   11篇
  2008年   22篇
  2007年   21篇
  2006年   15篇
  2005年   16篇
  2004年   12篇
  2003年   13篇
  2002年   8篇
  2001年   6篇
  2000年   4篇
  1999年   9篇
  1998年   5篇
  1997年   4篇
  1996年   11篇
  1995年   8篇
  1994年   3篇
  1993年   6篇
  1992年   5篇
  1991年   5篇
  1990年   8篇
  1989年   4篇
  1988年   10篇
  1987年   3篇
  1985年   2篇
  1984年   3篇
  1982年   1篇
  1981年   2篇
  1980年   3篇
  1979年   1篇
  1978年   3篇
  1977年   1篇
  1976年   3篇
  1975年   1篇
  1973年   1篇
排序方式: 共有449条查询结果,搜索用时 265 毫秒
321.
Unmarried Cohabitation and Parenthood in Britain and Europe   总被引:4,自引:0,他引:4  
This paper focuses on cohabitation and unmarried parenthood across a range of European nations. It includes a brief outline of the history of cohabitation, reviews recent trends in cohabitation and unmarried parenthood, compares the stability of marital and cohabiting unions, examines the extent to which cohabiting couples are regarded as families, and the final sections include a review of the policy responses to date, as well as a discussion of the impetuses that may lie behind the rise in cohabitation and unmarried parenthood.  相似文献   
322.
This article provides a nationally representative profile of noninstitutionalized children 0 to 17 years of age who were receiving support from the Supplemental Security Income (SSI) program because of a disability. To assess the role of the SSI program in providing assistance to low-income children with disabilities and their families, it is important to obtain detailed information on demographic characteristics, income and assets, health and disabilities, and health care utilization. Yet administrative records of the Social Security Administration do not contain many of the relevant data items, and the records provide only an incomplete picture of the family relationships affecting the lives of children with disabilities. The National Survey of SSI Children and Families fills this gap. This summary article is based on survey interviews conducted between July 2001 and June 2002 and provides some highlights characterizing children with disabilities who were receiving SSI and their families. Most children receiving SSI (hereafter referred to as "SSI children") lived in a family headed by a single mother, and less than one in three lived with both parents. A very high proportion, about half, were living in a household with at least one other individual reported to have had a disability. About 70 percent of children received some kind of special education. SSI support was the most important source of family income, with earnings a close second. On average, SSI payments accounted for nearly half of the income for the children's families, and earnings accounted for almost 40 percent. When all sources of family income were considered, slightly more than half (54 percent) of SSI children lived in families above the poverty threshold, a notable fact given that the federal SSI program guarantees only a subpoverty level of income. However, beyond these averages there was substantial variation, with some children living in families with income well below the poverty threshold and others having income well over 200 percent of the poverty threshold. About one-third of SSI children lived in families owning a home, two-thirds lived with parents or guardians with at least one car, and about 40 percent lived with parents or guardians with zero liquid assets. Less than 4 percent lived with adults who owned stocks, mutual funds, notes, certificates of deposit, or savings bonds. The Social Security Administration's administrative records contain only a limited amount of information about disability diagnoses. The National Survey of SSI Children and Families supplements those records with data from an array of questions on functional limitations, self-reported health, and the perceived severity of disabilities. The data suggest that a great degree of variation in severity exists within the childhood caseload, as reflected in reports of the presence or absence of six functional limitations, perceived overall health status, and perceived impact of disability on the child's ability to do things. Overall, 36 percent of the children were reported to have had disabilities that affected their abilities to do things "a great deal," and for 21 percent their difficulties had very little or no impact. Physical disabilities were most common among children aged 0 to 5, and mental disabilities dominated the picture for the other two age groups: 6 to 12 and 13 to 17. Virtually all SSI children are covered by some form of health insurance, with Medicaid being by far the most common source of health insurance coverage. Just as in the case of the severity of disabilities, substantial variation was reported in health care utilization among SSI children. Almost 30 percent of children had two or fewer doctor visits during the 12 months preceding the interview, and close to 50 percent had five or more doctor visits. About four-fifths of the children had no reported hospitalizations or surgeries during the previous year. More than 40 percent of the children visited an emergency room during the previous year, most of them more than once. Importantly, no out-of-pocket costs associated with medical care were reported for more than two-thirds of the children, and only about 3 percent had annual expenses exceeding $1,000 for physical and mental health care. This finding suggests that SSI payments are not used to cover medical expenses for the overwhelming majority of children. The use of supportive therapies varied widely among SSI children: more than half reported having used physical, occupational, or speech therapy; only 8 percent used respite care for the parents or other family members. An analysis of the perception of the survey respondents shows that more than one-third of children had unmet needs for mental health counseling services, and about three-quarters of families had unmet needs for respite care. In several service categories, the proportion perceived to have had unmet service needs was around 10 percent or less. In the dominant service category of physical, occupational, and speech therapy, only 11 percent perceived to have had unmet service needs.  相似文献   
323.
Most known carrion-breeding species of blowflies in southern Australia are of the genus Calliphora. The morphological similarity of the immatures of these species means that correctly identifying them poses a challenge for forensic entomologists. This study investigates the potential of allozyme analysis to assist with this task. Molecular profiles of third-instar larvae and adults representing four of these carrion-breeding species, Calliphora stygia, C. dubia, C. hilli hilli, and C. vicina, were compared at 42 allozyme loci. The two life stages were found to display almost identical allozyme profiles in each species (93% of loci were expressed in both life history stages), enabling the reliable identification of larvae in these four species. Integration of these results with data from a previous study indicates that allozyme analysis would also be suitable for rapid, species-level identification of the larvae of six other carrion-breeding Calliphora species occurring in southern Australia. This is the first report of the application of allozyme data to the identification of forensically important blowflies.  相似文献   
324.
Deveny K 《Newsweek》2003,141(26):40-46
  相似文献   
325.
326.
327.
Reviews     
Thomas Remington (ed.), Parliaments in Transition. The New Legislative Politics in the Former USSR and Eastern Europe. Boulder, CO: Westview Press, 1994, vii + 246pp.

Carlos Taibo, La disolución de la URSS. Barcelona: Ronsel, 1994, xii + 376 pp., 1900 pesetas.

Miroslav Shkandrij, Modernists, Marxists and the Nation. The Ukrainian Literary Discussion of the 1920s. Edmonton: Canadian Institute of Ukrainian Studies Press, University of Alberta, 1992, xii + 265 pp.

Don C. Rawson, Russian Rightists and the Revolution of 1905. Cambridge: Cambridge University Press, 1995, xvi + 286 pp., £40.00 h/b, £19.95 p/b.

Mary Schaeffer Conroy, In Health and in Sickness: Pharmacy, Pharmacists and the Pharmaceutical Industry in Late Imperial, Early Soviet Russia. New York: East European Monographs, Boulder, distributed by Columbia University Press, 1994, viii + 703 pp., h/b, No price.

William Millinship, Frontline: Women of the New Russia. London: Methuen, 1993, xxi + 297 pp., £9.99 p/b.

Sebastian Siebel‐Achenbach, Lower Silesia from Nazi Germany to Communist Poland, 1942–1949. London and Basingstoke: The Macmillan Press Ltd, 1994, vii + 381 pp., £47.50.

John Erickson & David Dilks (eds), Barbarossa. The Axis and the Allies. Edinburgh: Edinburgh University Press, 1994, xii + 287 pp., £25.00

Yuri Pavlov, Soviet‐Cuban Alliance; 1959–1991. New Brunswick and London: Transaction Publishers, 1994, iv + 272 pp., $18.95.

Joshua Fogel, The Cultural Dimension of Sino‐Japanese Relations: Essays on the Nineteenth and Twentieth Centuries. Armonk, NY: M.E. Sharpe, 1995, 216 pp., £40.00 h/b, £16.00 p/b  相似文献   

328.
329.
330.
This study examined the prevalence and correlates of sleep disturbance in adolescents. Two hundred seventy-seven 9th- and 10th-grade students completed a questionnaire on sleep quality, sleep habits, beliefs about sleep, and daytime mood and functioning. Based on their responses, subjects were classified as good sleepers (66%), occasional poor sleepers (23%), and chronic poor sleepers (11%). Occasional and chronic poor sleepers reported being significantly more depressed, without energy, tense, moody, and irritable and less rested and alert than good sleepers. They were also more likely to describe themselves negatively. However, poor sleepers were not consistently more tired than good sleepers. Rather, they tended to be least tired in the evening, the time when most good sleepers reported feeling tired. There were few differences in the sleep habits and beliefs about sleep of good and poor sleepers. All subjects reported shifts in bedtimes and waketimes from weekdays to weekends, with occasional and chronic poor sleepers showing a tendency toward greater shifts, a possible factor contributing to their sleep disturbance. Occasional and chronic poor sleepers also reported more observable behaviors and feelings of stress than good sleepers. The need for early intervention with particular attention to teaching adolescents about good sleep habits and the need for stable bedtimes and waketimes and the possibility of joint intervention on daytime stress and sleeping problems are discussed.  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