全文获取类型
收费全文 | 262篇 |
免费 | 19篇 |
专业分类
各国政治 | 13篇 |
工人农民 | 15篇 |
世界政治 | 20篇 |
外交国际关系 | 21篇 |
法律 | 106篇 |
中国政治 | 11篇 |
政治理论 | 92篇 |
综合类 | 3篇 |
出版年
2023年 | 5篇 |
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 9篇 |
2019年 | 11篇 |
2018年 | 17篇 |
2017年 | 16篇 |
2016年 | 21篇 |
2015年 | 18篇 |
2014年 | 9篇 |
2013年 | 38篇 |
2012年 | 5篇 |
2011年 | 8篇 |
2010年 | 13篇 |
2009年 | 7篇 |
2008年 | 10篇 |
2007年 | 9篇 |
2006年 | 11篇 |
2005年 | 2篇 |
2003年 | 3篇 |
2002年 | 7篇 |
2001年 | 3篇 |
2000年 | 1篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1973年 | 2篇 |
1969年 | 2篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1966年 | 2篇 |
排序方式: 共有281条查询结果,搜索用时 15 毫秒
251.
Aaron Donaghy 《圆桌》2015,104(2):237-239
252.
253.
Aaron A.Vessup 《北京周报(英文版)》2013,56(36):48
Can too much of anything good be dangerous to your health,like the legendary"Midas Touch"for example?Today people often debate whether or not too much gold or money hurt people physically.How about too much beer?Can one ever play too much badminton or tennis?Take your pick the facts of the matter are any one of the above mentioned can lead one into a strange realm of the outer limits of mental or physical pain.Then of course comes the question of remedies,what can one do?Most teachers become familiar with problems such as sore throats from 相似文献
254.
Aaron Gershonowitz 《环境索赔杂志》2007,19(4):266-276
To deal effectively with environmental regulatory agencies and to better defend environmental claims requires a clear understanding of the regulatory agencies. This article examines some popularly held views about the environmental regulatory agencies that have little or no basis in fact and that can lead to greater costs and greater difficulty in dealing effectively with environmental issues. 相似文献
255.
256.
257.
258.
259.
260.
Forensic entomologists use size and developmental stage to estimate blow fly age, and from those, a postmortem interval. Since such estimates are generally accurate but often lack precision, particularly in the older developmental stages, alternative aging methods would be advantageous. Presented here is a means of incorporating developmentally regulated gene expression levels into traditional stage and size data, with a goal of more precisely estimating developmental age of immature Lucilia sericata. Generalized additive models of development showed improved statistical support compared to models that did not include gene expression data, resulting in an increase in estimate precision, especially for postfeeding third instars and pupae. The models were then used to make blind estimates of development for 86 immature L. sericata raised on rat carcasses. Overall, inclusion of gene expression data resulted in increased precision in aging blow flies. 相似文献