全文获取类型
收费全文 | 22764篇 |
免费 | 639篇 |
专业分类
各国政治 | 1072篇 |
工人农民 | 886篇 |
世界政治 | 1795篇 |
外交国际关系 | 828篇 |
法律 | 13625篇 |
中国共产党 | 2篇 |
中国政治 | 110篇 |
政治理论 | 4869篇 |
综合类 | 216篇 |
出版年
2020年 | 269篇 |
2019年 | 324篇 |
2018年 | 418篇 |
2017年 | 505篇 |
2016年 | 531篇 |
2015年 | 373篇 |
2014年 | 447篇 |
2013年 | 2307篇 |
2012年 | 527篇 |
2011年 | 556篇 |
2010年 | 477篇 |
2009年 | 496篇 |
2008年 | 581篇 |
2007年 | 610篇 |
2006年 | 595篇 |
2005年 | 512篇 |
2004年 | 516篇 |
2003年 | 548篇 |
2002年 | 484篇 |
2001年 | 870篇 |
2000年 | 785篇 |
1999年 | 663篇 |
1998年 | 365篇 |
1997年 | 305篇 |
1996年 | 264篇 |
1995年 | 260篇 |
1994年 | 306篇 |
1993年 | 278篇 |
1992年 | 425篇 |
1991年 | 488篇 |
1990年 | 442篇 |
1989年 | 454篇 |
1988年 | 433篇 |
1987年 | 466篇 |
1986年 | 456篇 |
1985年 | 441篇 |
1984年 | 390篇 |
1983年 | 412篇 |
1982年 | 324篇 |
1981年 | 310篇 |
1980年 | 233篇 |
1979年 | 351篇 |
1978年 | 232篇 |
1977年 | 198篇 |
1976年 | 181篇 |
1975年 | 190篇 |
1974年 | 204篇 |
1973年 | 188篇 |
1972年 | 154篇 |
1971年 | 139篇 |
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
251.
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
252.
The authors present a historical overview of urbanization in Venezuela. The impact of the oil economy on population change and spatial distribution is emphasized. A typology of cities based on socioeconomic function and on a demographic classification of urban centers is devised. Future trends in urbanization are also considered. (SUMMARY IN ENG) 相似文献
253.
254.
255.
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
256.
257.
In 90 forensic autopsies (Craniocerebral injury, gunshot, stabbing, blow, strangulation, etc.), semithin sections of great arteries were prepared from around 770 Epon blocks and checked for vital reactions at the mural and intimal ruptures. In 21 cases in which death had occurred immediately or soon after the trauma, with three exceptions, there was a subsequent electron microscopic investigation. In all six mural ruptures and in five of ten intimal ruptures, thrombocyte aggregates were found at the rupture margins. In five intimal ruptures, the possibility of the occurrence of preparations injuries had to be considered. In five cases, the results of the histological study were negative. The success rate is limited in principle in such a screening test since there are technical difficulties in preparing serial sections on long vessels. Death was rapid and the thrombocytes were observed to adhere to the injured wall sites immediately after the trauma. The "thrombocyte sign" is thus of substantial importance as the earliest local vital reaction. In two control cases (strangulation), thrombocyte aggregates were found at intimal ruptures of the basilar artery, which were regarded as the results of stretching via the vertebral arteries during attacks to the neck. The healing processes of intimal ruptures and traumatic medial necrosis in incomplete ruptures occurring later in life are discussed. Even if a cadaver is a few days old, the histological findings at the level of the thrombocytes can be evaluated. 相似文献
258.
259.
260.