全文获取类型
收费全文 | 2913篇 |
免费 | 109篇 |
专业分类
各国政治 | 231篇 |
工人农民 | 96篇 |
世界政治 | 295篇 |
外交国际关系 | 194篇 |
法律 | 1133篇 |
中国政治 | 13篇 |
政治理论 | 984篇 |
综合类 | 76篇 |
出版年
2023年 | 10篇 |
2022年 | 10篇 |
2021年 | 23篇 |
2020年 | 46篇 |
2019年 | 55篇 |
2018年 | 97篇 |
2017年 | 83篇 |
2016年 | 103篇 |
2015年 | 59篇 |
2014年 | 75篇 |
2013年 | 450篇 |
2012年 | 98篇 |
2011年 | 99篇 |
2010年 | 74篇 |
2009年 | 83篇 |
2008年 | 94篇 |
2007年 | 115篇 |
2006年 | 77篇 |
2005年 | 106篇 |
2004年 | 95篇 |
2003年 | 75篇 |
2002年 | 84篇 |
2001年 | 76篇 |
2000年 | 74篇 |
1999年 | 59篇 |
1998年 | 49篇 |
1997年 | 48篇 |
1996年 | 51篇 |
1995年 | 44篇 |
1994年 | 41篇 |
1993年 | 35篇 |
1992年 | 45篇 |
1991年 | 47篇 |
1990年 | 45篇 |
1989年 | 42篇 |
1988年 | 34篇 |
1987年 | 19篇 |
1986年 | 24篇 |
1985年 | 26篇 |
1984年 | 24篇 |
1983年 | 22篇 |
1982年 | 30篇 |
1981年 | 38篇 |
1980年 | 28篇 |
1979年 | 13篇 |
1978年 | 14篇 |
1977年 | 11篇 |
1975年 | 12篇 |
1974年 | 12篇 |
1967年 | 7篇 |
排序方式: 共有3022条查询结果,搜索用时 0 毫秒
321.
322.
323.
This study examines the complexity of contradictory interests in the relationship between parents and adult children among agricultural wage laborers in rural Netherlands about 1900. One important potential issue of conflict was the marriage of children. In the case of wage laborers, Hajnal's independent livelihood theory is not really helpful in explaining regional differences in age at marriage. Marriage is viewed as a problem of balance and competition between the livelihood problems of parents and children. Two main issues of wage laborers are dealt with: the help adult children give to elderly parents and the control of the earnings of unmarried adolescent and adult children by their parents. Regional variations in children's help and parental control are measured and explained using four independent variables: extent of property ownership by wage laborers, extent of their production for the market (and need for unpaid family labor), wage level, and percentage who belonged to traditional religions in the village. Statistical analysis suggests that the property of agricultural wage laborers was most important in explaining variation in parent–child relationships. Wage level and religion also showed considerable explaining power, particularly for wages earned by unmarried children. 相似文献
324.
325.
326.
327.
328.
Scientific evidence is often more reliable than other types of evidence commonly used in criminal trials – i.e., eyewitness identifications, confessions, and informant testimony. Nevertheless, despite its obvious value, forensic science has not always merited the term "science." Three developments in the 1990s focused attention on its shortcomings: the advent of DNA profiling, the Supreme Court's "junk science" decision, and a number of wellpublicized crime laboratory scandals. In light of these developments, and in order to take full advantage of the power of forensic science to aid in the search for truth, a number of reforms are needed: Crime laboratories should be accredited, lab procedures should be standardized, and basic research needs to be conducted on many commonly used techniques. Court procedures also require improvement: Defense experts should be more readily available to indigent defendants, and more comprehensive pretrial disclosure of the substance of expert testimony should be provided. 相似文献
329.
330.