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   71447篇
  免费   3299篇
各国政治   4531篇
工人农民   2972篇
世界政治   6324篇
外交国际关系   3885篇
法律   34300篇
中国共产党   11篇
中国政治   755篇
政治理论   21018篇
综合类   950篇
  2021年   411篇
  2020年   1172篇
  2019年   1522篇
  2018年   1701篇
  2017年   2017篇
  2016年   2200篇
  2015年   1835篇
  2014年   2115篇
  2013年   10613篇
  2012年   1701篇
  2011年   1817篇
  2010年   1881篇
  2009年   2089篇
  2008年   1841篇
  2007年   1824篇
  2006年   1941篇
  2005年   1842篇
  2004年   1737篇
  2003年   1580篇
  2002年   1576篇
  2001年   1808篇
  2000年   1565篇
  1999年   1365篇
  1998年   1162篇
  1997年   1029篇
  1996年   994篇
  1995年   958篇
  1994年   991篇
  1993年   991篇
  1992年   1046篇
  1991年   1084篇
  1990年   1011篇
  1989年   1072篇
  1988年   1046篇
  1987年   1062篇
  1986年   1051篇
  1985年   1102篇
  1984年   984篇
  1983年   1046篇
  1982年   936篇
  1981年   892篇
  1980年   699篇
  1979年   746篇
  1978年   611篇
  1977年   559篇
  1976年   522篇
  1975年   443篇
  1974年   439篇
  1973年   438篇
  1972年   392篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
841.
In this article we examine how increasing the reimbursement of physicians and expanding Medicaid eligibility affect access to care for children in Cook County, Illinois, which overlies Chicago. Using Medicaid claims and other data at the zip-code level, we compare the places where Medicaid children live with the places where all the physicians who treat children and those who accept Medicaid patients have their practices. Our findings suggest that the recent changes in legislation are unlikely to benefit extremely poor children, who are more likely to live in depressed inner-city areas, where there are few physicians. "Near-poor" children whose homes are dispersed throughout the county, who are now eligible for Medicaid as a result of the recent changes, are likely to see improvements in their access to care. Further changes in policy, aimed at enhancing the capacity of institutions providing care, could improve access for the children of the inner city.  相似文献   
842.
843.
844.
The Iran-Contra affair is an example of the type of event that is expected to give rise to a rally of public opinion behind the president. However, the public's response to this event, uncharacteristically, was a sharp decrease in support for President Reagan. This case study constitutes an attempt to explore the sources of the public opinion response to foreign policy events. Statements of political elites, news coverage and commentary, and public opinion assessments are examined to test the patriotism, priming, and opinion leadership explanations of the rally phenomenon. The actions of opinion leaders appears to provide the best explanation of the differential public response to the Iran-Contra affair.  相似文献   
845.
We report seven fatalities resulting from the ingestion of illicit drugs packaged in condoms, rubber balloons, or plastic bags which were observed in the last 4 years at the Office of the Chief Medical Examiner, State of Maryland. All the victims, with the exception of one, were men ranging in age from 19 to 37 years. There was no racial predominance. No drug paraphernalia was found at any scene. In two cases, seizure-like activity was documented. One victim had recently returned from Nigeria; therefore, Lassa fever was initially suspected. Two of the victims were "body packer" contrabanders who had just arrived from Africa. They used body cavities to hide large amounts of heroin to avoid U.S. Customs. The other five cases were "mini-packers," small-time illicit drug dealers who had swallowed a single bag of cocaine to avoid police detection. The possible mechanism of leaking or rupture of the latex container is discussed.  相似文献   
846.
During preliminary examination of the body of a homicide victim, a peculiar red "fiber" was noticed and recovered. Initially believing this to be a carpet fiber, the item was subjected to fiber analysis. It was found to be a short coiled particle not like any known natural or synthetic fabric fiber. Subsequent examinations determined this "fiber" to be the larva of a common freshwater midge (Diptera; Chironomidae). Chironomid larvae have been observed on other bodies recovered from freshwater environments. Entomological studies of this organism have led to the conclusion that the presence of chironomid larvae indicates submersion of the body.  相似文献   
847.
848.
So far, the law in the Federal Republic of Germany still allows the injection of fresh-cell preparations from animals as a roborant to increase the vitality of the organism and to strengthen the body's immune defense system. The use of "sicca-cell" preparations was provisionally forbidden in 1987 by the Federal Health Organization (Bundesgesundheitsamt; BGA). Prohibition of fresh-cell injections would have exceeded the authority of this office, although the same serious reservations also applied in the case of this treatment method. Several publications that have appeared since 1955 have reported serious complications of this therapy, some life-threatening and some even lethal. Two further cases are now added: (1) A woman aged 69 had been receiving treatment with cell injections for 9 years. Immediately after an injection of sicca cells she collapsed and was hospitalized; 7 days thereafter she developed an ascending paralysis with increasing inability to swallow or breathe. She died 25 days after the injection as a consequence of central and peripheral respiratory failure. Autopsy revealed the alterations typical for acute Landry-Guillain-Barré-Strohl syndrome. (2) A 76-year-old healthy woman had been receiving treatment with fresh-cell preparations for several years. After an injection of cell suspensions a painful local swelling was observed. The symptoms were interpreted as the consequence of an iatrogenic local hematoma, and repeated punctures were performed to obtain blood. The patient was transferred to a surgical department for further therapy. Two days after the injection she suddenly died with signs of acute cardiovascular failure. Autopsy revealed the signs of a fulminating clostridial infection and also the characteristic signs of Landry-Guillain-Barré syndrome with involvement of the autonomic nervous system. In both cases the development of an inflammatory process in the peripheral nervous system could be interpreted as an immune-mediated allergic disease, related to the repeated injection of heterologous antigenic material containing nervous tissues. This hypothesis would also explain the two other cases already published and would be consistent with the observed perivenous leukoencephalopathy of the central nervous system. The human disease pictures correspond to the well-established animal models of EAEM (experimental allergic encephalomyelitis) and EAN (experimental allergic neuritis). The pathogenesis is discussed; the major role of the central and peripheral nervous system is stressed, with special reference to the risk of acute autonomic failure. The need for specific autopsy techniques for the investigation of the entire nervous system, including spinal cord, roots, spinal ganglia and peripheral nerves with sympathetic chains, is raised.  相似文献   
849.
The National Abortion Rights Action League (NARAL) and the Women's Legal Defense Fund (WLDF) co-authored an "amicus curiae" brief in "Webster." The brief was written for 77 organizations who believe in equality of women. The brief said that constitutional protection of a woman's right to choose is guaranteed by the right to privacy. The brief said that if abortions were illegal, women would not be able to take place in society equally with men. Liberty would be taken away from women. If the state interferes with abortion, the principle of bodily integrity is violated. In "Winston v. Lee," the Supreme Court found that the state could not compel a criminal to undergo an invasive surgical procedure to retrieve a bullet necessary for the state to prosecute with. 1 in 4 women have a cesarean section, which requires a larger incision in the abdomen, and has many risks. Bearing and raising children often puts a damper on women's employment opportunities. Therefore, if the Supreme Court denied women the right to bear children when and where they wanted, women would not have the right to plan their futures. If the Supreme Court were to agree that "interest in potential life outweighs" a woman's tight to procreate autonomously, states could declare all abortions illegal, investigate them to see if they were induced on purpose, and murder women who induced them. Contraceptive devices could be declared illegal. Laws could be used to force women to submit to cesarean sections and other fetal surgery. Pre-viability abortion restrictions should be rejected because they have old-fashioned notions of women's role in society. They reinforce stereotypes. Missouri's law stresses aiding "potential," rather than actual life.  相似文献   
850.
Empathy is defined as an affect more appropriate to another's situation than to one's own. The paper (i) summarizes different modes of empathic affect arousal; (ii) shows how empathic affect may interact with social-cognitive development, to produce four levels of empathy development; (iii) suggests that causal attributions may transform empathic affect into sympathy, guilt, and empathic anger, which are major moral affects; (iv) discusses how these affects may influence moral judgment and behavior; (v) points up empathic morality's limitations and the need to embed empathy in relevant moral principles; (vi) discusses possible links between empathy and justice principles, with special focus on Rawls; (vii) illustrates the interplay of empathy, moral judgment, and justice; and (viii) suggests that moral principles may become hot cognitions.  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