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   69034篇
  免费   3300篇
各国政治   4492篇
工人农民   2912篇
世界政治   6177篇
外交国际关系   3827篇
法律   32468篇
中国共产党   10篇
中国政治   749篇
政治理论   20758篇
综合类   941篇
  2021年   411篇
  2020年   1161篇
  2019年   1524篇
  2018年   1667篇
  2017年   1979篇
  2016年   2188篇
  2015年   1843篇
  2014年   2107篇
  2013年   10560篇
  2012年   1615篇
  2011年   1736篇
  2010年   1833篇
  2009年   2058篇
  2008年   1766篇
  2007年   1730篇
  2006年   1899篇
  2005年   1788篇
  2004年   1687篇
  2003年   1499篇
  2002年   1548篇
  2001年   1639篇
  2000年   1428篇
  1999年   1251篇
  1998年   1131篇
  1997年   985篇
  1996年   966篇
  1995年   928篇
  1994年   949篇
  1993年   974篇
  1992年   968篇
  1991年   1016篇
  1990年   947篇
  1989年   1021篇
  1988年   1003篇
  1987年   1000篇
  1986年   1013篇
  1985年   1055篇
  1984年   931篇
  1983年   985篇
  1982年   891篇
  1981年   851篇
  1980年   666篇
  1979年   709篇
  1978年   586篇
  1977年   525篇
  1976年   485篇
  1975年   396篇
  1974年   415篇
  1973年   424篇
  1972年   372篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
801.
Isoenzyme band patterns of animal blood erythrocyte acid phosphatase (EAP) and phosphoglucomutase-1 (PGM) were studied by isoelectric focusing on ultrathin polyacrylamide gels. For blood from all animals tested (dog, cat, cow, sheep, and goat), the overall band patterns for both isoenzymes were different from those of the most common human types of these enzymes, although some animal EAP and PGM bands appeared in the human band areas. When mixtures of human and animal red blood cells were studied, it was found that misinterpretation of human types was possible only if the overall band pattern of the mixtures was ignored. For the animal blood tested, the strong PGM bands appearing outside the human band areas could be used as "markers" for the possible presence of animal blood in the samples tested.  相似文献   
802.
This brief opposes the overturn of "Roe v. Wade" and resists weakening "Roe's central holding" that would allow states to overturn legal abortion. The brief was written for 885 law professors. "Roe" was not a "constitutional aberration," or "an exercise of raw, judicial power." Some members of the Supreme Court seem to think that the state has "an overriding interest" in protecting fetal life. Some Court members have questioned "Roe's" trimester framework. A person's decision to abort should be done privately. If women are not free to choose abortion, they will not have equality. There is an absence of "express rights of privacy and procreational freedom" in the Constitution. "Roe" was 1 instance of the Court's recognition of constitutional rights that are not named explicitly. Historical materials are drawn on to show the link between trends in society and the "judicial recognition of unenumerated rights." The most serious questions about "Roe" deal with its trimester framework. Justice Blackmun's majority opinion said that the 1st trimester of pregnancy was personal. "Roe" said that abortions created a medical risk at the beginning of the 2nd trimester. Therefore, the government was more interested in the health of the mother at that time. The state could then regulate abortion "in ways that are reasonable related to maternal health." The start of the 3rd trimester was when the fetus was viable. The right of a woman to end her pregnancy "offends powerful moral forces." Some of "Roe's" critics had their scientific facts wrong. Medical authorities think Justice O'Connor is mistaken when she says that "Roe" is "on a collision course with itself." The 23rd to 24th week of pregnancies where the fetal organs can "sustain life outside the womb." This has not changed since "Roe" was decided in 1973, nor is it likely to in the future. Some "amici" believe that the state can never have an interest in the fetus. The state can not have an interest in the fetus distinct from the woman who will give birth to it. During previability, restricting a woman's procreational rights would not be scientifically supportable. The state does have an interest in "upholding the value of human life." "Roe" is "within the mainstream" of constitutional jurisprudence and should be reaffirmed.  相似文献   
803.
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   
804.
The computer-mediated network is a moderately expanding phenomenon. A major reason for this growth is the need for transferring technology to developing nations. But because many of these nations are not traditional users of advanced technology and because even the purveyors are not yet fully comfortable with the networks, the medium is not being used as much as perhaps it ought to be. In establishing a multinational network, one should be careful to treat all potential users with equity and not create an informational elite. Part of the challenge of such a system is making it accessible to operatives in the field. An effective way of introducing a network is to blend it with existing technologies, keep the costs down and the quality of information up, provide a usable information-retrieval system, and pay attention to microand macro-ergonomics. The Adult Education Network (AEDNET) of the Kellogg Project at Syracuse University has started working on a next-generation computer-mediated network system. It is proposed that AEDNET involve three action groups in the project: researchers, those interested in social implications, and users.  相似文献   
805.
"In this essay, certain aspects related to rural-urban mortality differentials in Mexico are analyzed....[These include] the availability, advantages, and limitations of different sources of information and the disparity of levels and tendencies according to particular indicators of acceptable reliability, especially those deriving from recent demographic surveys conducted in Mexico. The findings confirm an inverse ratio between size of settlement and mortality, and reveal a widening of the differentials over time." (SUMMARY IN ENG)  相似文献   
806.
Introduction     
Gunlicks  Arthur B. 《Publius》1989,19(4):1-15
The Federal Republic of Germany celebrated its fortieth anniversaryin May 1989. In spite of the devastation brought by World WarII, the division of the country between East and West, and theloss of one-fourth of its territory, the Bonn Republic was foundedunder more propitious circumstances than was its democraticpredecessa after World War I, the Weimar Republic. Togetherwith an "economic miracle" that brought about economic growthand a high standard of living. West Germany experienced a "politicalmirracle" that led to governmental stability and a system asdemocratic as any other in Europe. Federalism has contributedto this miracle, and, in contrast to the nineteenth century,is now identified closely with democracy in Germany. The articlescontained in this volume provide a broad overview of postwarfederalism in Germany, from its origins, organization, strengths,and weaknesses, to interpretations and assessments of currenttrends and developments.  相似文献   
807.
It is by now widely accepted that social science research has only an indirect and general impact on public policymaking. Academic social science research, it is often argued, is antithetical to policy research: the former is animated by traditional scientific canons while the latter is specific and problem-oriented. Moreover, modern bureaucracies are now understood as political environments within which pure research will be routinely ignored if it does not serve someone's interests. For these and other reasons, social scientists are being encouraged either to eschew policy research or not to expect much influence. This article provides an alternative model of social scientists in the policy process, as consulting critics reviewing, analyzing and commenting upon substantive policy research. This model holds benefits for both scholars and clients, turns the canons of scientific inquiry into assets instead of liabilities, and responds to some of the concerns recently raised in the literature concerning the role of social science in the policy process.  相似文献   
808.
809.
A precise method for evaluating election schemes   总被引:1,自引:0,他引:1  
A previously published paper evaluated election schemes under a wide variety of election circumstances. This paper improves upon the previous work by refining the measures used to rate the election schemes and increasing the statistical significance of those ratings. With these modifications, we can now draw some new conclusions:
  1. In general circumstances, the Borda System outperforms the Copeland System which outperforms Approval which outperforms Majority Rule.
  2. The Maximin Rule — strongly supported by Rawls's — turns out to be a reasonable election rule if the number of election alternatives is large relative to the number of voters.
  3. With two exceptions, all our election systems performed quite well given a society with highly correlated utilities.
  4. Given a polarized society, a serial dictatorship was better than every other election system except Borda.
Perhaps even more importantly, we now have the possibility of conducting some cost/benefit analyses of different proposals for electoral changes.  相似文献   
810.
There is always a temptation to suppose that one's own problems (whether personal or national) are unique. They rarely are. The "problem" of the elderly is no exception and so there is no particular point in looking to the specific characteristics of one's own health, social service, and social security systems for causes. There is, however, every reason to be looking at them for the consequences. They can also exacerbate the causes. In this paper we sketch the principal features (economic, social, and demographic) that have contributed to the "problem" of the elderly in Europe and then outline the main intellectual issues that need to be explored and resolved. That sounds a bit pompous but, if one is to avoid an intellectual morass consisting of the various assertions about needs, obligations, and so on that emanate from rival concerned parties and various professional interests on the one hand, and simplistic political slogans whose only virtue is that they cut the Gordian Knot (but provide no real enlightenment) on the other, then we need to be doing just this. We shall take a few things for granted: that cost-containment is not the be-all-and-end-all of policy; that value for money depends equally on what you get as on what you spend; that overall expenditure per head is mainly determined by income per head (though some countries have managed to get and stay below the regression line); and that it "ain't so" that all one needs to do is to "leave it to the market." To have justified each of these would have taken too much space so we can only assert them and trust that, in swallowing these camels, you won't strain at the gnats to come.  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