全文获取类型
收费全文 | 5878篇 |
免费 | 286篇 |
国内免费 | 1篇 |
专业分类
各国政治 | 364篇 |
工人农民 | 26篇 |
世界政治 | 671篇 |
外交国际关系 | 832篇 |
法律 | 2570篇 |
中国共产党 | 392篇 |
中国政治 | 683篇 |
政治理论 | 253篇 |
综合类 | 374篇 |
出版年
2023年 | 34篇 |
2022年 | 33篇 |
2021年 | 23篇 |
2020年 | 36篇 |
2019年 | 41篇 |
2018年 | 61篇 |
2016年 | 39篇 |
2015年 | 39篇 |
2014年 | 180篇 |
2013年 | 134篇 |
2012年 | 370篇 |
2011年 | 363篇 |
2010年 | 208篇 |
2009年 | 191篇 |
2008年 | 263篇 |
2007年 | 307篇 |
2006年 | 289篇 |
2005年 | 283篇 |
2004年 | 252篇 |
2003年 | 293篇 |
2002年 | 285篇 |
2001年 | 202篇 |
2000年 | 187篇 |
1999年 | 128篇 |
1998年 | 102篇 |
1997年 | 95篇 |
1996年 | 77篇 |
1995年 | 107篇 |
1994年 | 99篇 |
1993年 | 69篇 |
1992年 | 64篇 |
1991年 | 66篇 |
1990年 | 58篇 |
1989年 | 67篇 |
1988年 | 107篇 |
1987年 | 87篇 |
1986年 | 90篇 |
1985年 | 102篇 |
1984年 | 95篇 |
1983年 | 100篇 |
1982年 | 67篇 |
1981年 | 64篇 |
1980年 | 94篇 |
1979年 | 42篇 |
1977年 | 23篇 |
1973年 | 18篇 |
1964年 | 23篇 |
1962年 | 18篇 |
1959年 | 16篇 |
1957年 | 16篇 |
排序方式: 共有6165条查询结果,搜索用时 265 毫秒
111.
112.
113.
Ham Chande R 《Estudios demográficos y urbanos》1995,10(3):687-705, 741
"Social and economic indicators depict Mexico as a country of intermediate development. It is also in intermediate stages of demographic and epidemiologic transitions. When these traits are translated into socio-demographic perspectives, all projections indicate that for the next fifty years we can expect: (i) percentage decreases in child and teen-age populations, (ii) large percentage and absolute increases in adult population, and (iii) important increases in the elderly population.... Among elders death due to infectious diseases is less common than within other sectors of [the] population. Mortality associated with chronic ailments has increased, with recent and remarkable changes during the last twenty years. This transformation is not evenly distributed. It is more accelerated in developed and urban areas as contrasted with the rural and less developed." (SUMMARY IN ENG) 相似文献
114.
115.
116.
Tort reform is controversial because of the need to balance cost considerations with the legitimate needs of plaintiffs who have suffered malpractice injury. In addition, proponents and opponents of the different proposals often formulate their positions based largely on anecdotal evidence and concerns of special interest groups rather than careful studies. As a result, it may be some time before malpractice reform is addressed comprehensively at the federal level, leaving the states to their own reform devices. 相似文献
117.
118.
"This work...examines the cultural dimension of sexuality and fertility of women from [low-income] sectors in Peru. It intends to explain the cultural processes that fall into the intermediate variables of fertility, such as marriage rate, contraception, breastfeeding and...abortion. These dimensions of sexual and reproductive life are analyzed according to two explanatory dimensions: generation and cultural context of socialization. The general hypothesis is that a cultural process of homogenization of the values and behaviors has been taking place over sexuality, in such a way that the younger generations will show similar standard behaviors and values no matter their context of socialization; in the meantime, in the older groups there will exist contextual differences in these dimensions." (SUMMARY IN ENG) 相似文献
119.
123 out of 850 suicides that occurred in the Canton of Geneva between 1980 and 1989 were suicides by submersion. 75 women and 48 men committed this kind of suicide. 89 victims (57 women and 32 men) were older than 40 years. In all cases the spatial distance between the residence of the suicides and the nearest river or lake was determined; a correlation with the tendency to commit suicide by drowning was not evident. More than geographical factors, the psychological influences have to be considered. 相似文献
120.