全文获取类型
收费全文 | 4167篇 |
免费 | 622篇 |
专业分类
各国政治 | 518篇 |
工人农民 | 208篇 |
世界政治 | 407篇 |
外交国际关系 | 263篇 |
法律 | 1964篇 |
中国政治 | 64篇 |
政治理论 | 1299篇 |
综合类 | 66篇 |
出版年
2023年 | 31篇 |
2022年 | 32篇 |
2021年 | 59篇 |
2020年 | 108篇 |
2019年 | 229篇 |
2018年 | 177篇 |
2017年 | 239篇 |
2016年 | 271篇 |
2015年 | 211篇 |
2014年 | 222篇 |
2013年 | 908篇 |
2012年 | 187篇 |
2011年 | 162篇 |
2010年 | 178篇 |
2009年 | 133篇 |
2008年 | 165篇 |
2007年 | 155篇 |
2006年 | 125篇 |
2005年 | 128篇 |
2004年 | 97篇 |
2003年 | 98篇 |
2002年 | 95篇 |
2001年 | 54篇 |
2000年 | 57篇 |
1999年 | 60篇 |
1998年 | 48篇 |
1997年 | 41篇 |
1996年 | 33篇 |
1995年 | 41篇 |
1994年 | 34篇 |
1993年 | 26篇 |
1992年 | 40篇 |
1991年 | 23篇 |
1990年 | 21篇 |
1989年 | 30篇 |
1988年 | 31篇 |
1987年 | 16篇 |
1986年 | 26篇 |
1985年 | 19篇 |
1984年 | 21篇 |
1983年 | 19篇 |
1982年 | 15篇 |
1981年 | 19篇 |
1980年 | 18篇 |
1979年 | 14篇 |
1978年 | 8篇 |
1977年 | 15篇 |
1976年 | 7篇 |
1974年 | 6篇 |
1970年 | 7篇 |
排序方式: 共有4789条查询结果,搜索用时 15 毫秒
931.
932.
Laurie Gheddar MS Marie‐Odile Batt MD Jean‐Sébastien Raul PhD Pascal Kintz PhD 《Journal of forensic sciences》2021,66(1):272-277
Testing for drugs in hair raises several difficulties. Among them is the interpretation of the final concentration(s). In a post‐mortem case, analyses revealed the presence of furosemide (12 ng/mL) in femoral blood, although it was not part of the victim's treatment. The prosecutor requested our laboratory to undertake an additional analysis in hair to obtain information about the use of furosemide. A specific method was therefore developed and validated to identify and quantify furosemide in hair by UHPLC‐MS/MS. After decontamination of 30 mg of hair, incubation in acidic condition, extraction with ethyl acetate, the samples were analyzed by UHPLC‐MS/MS. Furosemide was found in the victim's hair at 225 pg/mg. However, it was not possible to interpret this concentration due to the absence of data in the literature. Therefore, the authors performed a controlled study in two parts. In order to establish the basis of interpretation, several volunteers were tested (four after a single 20 mg administration and twenty‐four under daily treatment). The first part indicated that a single dose is not detectable in hair using our method. The second part demonstrated concentrations ranging from 5 to 1110 pg/mg with no correlation between dosage and hair concentrations. The decedent's hair result was interpreted as repeated exposures. In the case of furosemide analysis, hair can provide information about its presence but cannot give information about dosage or frequency of use. 相似文献
933.
Are private donors willing to replace cuts in government funding? The authors conducted a survey experiment (n = 2,458) to examine how information about government funding affected decisions to donate money to a large charitable organization in the Netherlands. Providing information about actual budget cuts increased the number of donors. Most new donors were recruited among respondents who had processed the information correctly, underlining the importance of effective communication. The magnitude of the information effect was stronger for citizens with lower levels of empathic concern, who are less likely to donate but can be converted into donors. The authors conclude that policy information shapes not only attitudes but also civic engagement outside the political sphere. 相似文献
934.
935.
Flavia Maria de Mattos Donadelli 《Bulletin of Latin American research》2021,40(4):487-500
The Brazilian Higher Education (HE) sector, following a global trend of rapid transformation, has undergone marked changes over the past two decades. These changes have involved the design of quality assurance tools as instruments for regulatory governance. In presenting an overview of the recent history and characteristics of quality assurance in the Brazilian HE sector, this paper contextualises the Brazilian experience according to broader conceptual frameworks and discusses how and why regulatory governance in this sector has so radically changed. 相似文献
936.
Eric Shaw 《Public administration》2006,84(2):502-504
THE POLITICS OF MARKETING THE LABOUR PARTY Dominic Wring Palgrave Macmillan, 2005, 262 pp., £16.99 (pb) ISBN: 0333689534 相似文献
937.
Eric Shaw 《Public administration》2006,84(3):801-803
938.
939.
940.