全文获取类型
收费全文 | 1119篇 |
免费 | 55篇 |
专业分类
各国政治 | 61篇 |
工人农民 | 70篇 |
世界政治 | 88篇 |
外交国际关系 | 92篇 |
法律 | 597篇 |
中国共产党 | 1篇 |
中国政治 | 18篇 |
政治理论 | 246篇 |
综合类 | 1篇 |
出版年
2023年 | 11篇 |
2022年 | 15篇 |
2021年 | 39篇 |
2020年 | 41篇 |
2019年 | 50篇 |
2018年 | 54篇 |
2017年 | 54篇 |
2016年 | 55篇 |
2015年 | 39篇 |
2014年 | 51篇 |
2013年 | 186篇 |
2012年 | 58篇 |
2011年 | 48篇 |
2010年 | 27篇 |
2009年 | 40篇 |
2008年 | 38篇 |
2007年 | 51篇 |
2006年 | 33篇 |
2005年 | 17篇 |
2004年 | 30篇 |
2003年 | 21篇 |
2002年 | 23篇 |
2001年 | 18篇 |
2000年 | 21篇 |
1999年 | 10篇 |
1998年 | 9篇 |
1997年 | 10篇 |
1996年 | 14篇 |
1995年 | 12篇 |
1994年 | 8篇 |
1993年 | 9篇 |
1992年 | 12篇 |
1991年 | 8篇 |
1990年 | 8篇 |
1989年 | 6篇 |
1988年 | 7篇 |
1987年 | 3篇 |
1985年 | 2篇 |
1984年 | 8篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 3篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1174条查询结果,搜索用时 15 毫秒
81.
An HPLC-APCI-MS(/MS) method for the (trace) analysis of the most commonly encountered peroxide explosives, hexamethylenetriperoxidediamine (HMTD) and triacetonetriperoxide (TATP), has been developed. With this method, HMTD and TATP have been analyzed in the same run. (Pseudo-)molecular ions of these peroxides have been obtained as base peak under the same condition. A series of product ions was produced from these pseudo-molecular ions ([HMTD - 1]+ and [TATP + NH4]+) in the MS/MS analysis. We also pioneered in showing that a TATP molecular ion [TATP + H]+ can be observed with HPLC-MS/MS. The limit of detection for HMTD and TATP was 0.26 and 3.3 ng, respectively, on column by HPLC-MS in the Full Scan mode and 0.08 and 0.8, respectively, by HPLC-APCI-MS/MS in Selected Reaction Monitoring (single mass unit) mode. The method presented has been applied successfully for the identification of peroxides in the bulk solid state (powder sample), as well as in post-blast extracts originating from a forensic case. For the post-blast extracts, the use of tandem MS has been shown clearly to be of crucial importance for the identification and detection of the peroxide explosives. 相似文献
82.
83.
Henk Elffers Peter van der Heijden Merlijn Hezemans 《Journal of Quantitative Criminology》2003,19(4):409-439
Within a rational choice framework, secondary data analysis of a survey study on compliance with two Dutch regulatory laws is carried out. Selection of explanatory variables to be considered is guided by a heuristic device, called the Table-of-Eleven. Using adapted logistic regression analysis, we show that self-reported compliance, measured by means of a randomized response procedure, can be explained in terms of benefits of non-compliance, social norms and deterrence, while knowledge and general norm-conformity have no role to play. The impact of various contributing factors turns out to be rather different in size for the two laws. 相似文献
84.
Sarina Saragossi Bruno van Pottelsberghe de la Potterie 《The Journal of Technology Transfer》2003,28(1):47-51
In recent years, there has been a surge in patenting by Belgian universities. It appears that this increase can be attributed to growth of biotechnology, where there is a greater propensity to patent, to a desire on the part of universities to enhance commercialization through technology transfer offices (TTOs), and to effective collaboration between universities and government-sponsored research centers. Our qualitative analysis reveals that patent statistics could be a misleading indicator of an individual university's technological productivity, since many inventions are developed at universities, yet applied by other institutions. 相似文献
85.
Law and Critique - The degree of truth of Casanova’s History of My Life is a matter of heated debate. Doubt has been cast particularly on whether his stories of incest with his daughters... 相似文献
86.
87.
88.
89.
Thirsa Kraaijenbrink George L. van Driem Karma Tshering of Gaselô Peter de Knijff 《Forensic science international》2007
We studied the allele frequency distribution of 21 autosomal STR loci contained in the AmpFlSTR® Identifiler™ (Applied Biosystems), the Powerplex®16 (Promega) and the FFFL (Promega) multiplex PCR kits among 936 individuals from the Royal Kingdom of Bhutan. As such these are the first published autosomal DNA results from this country. 相似文献
90.
Few anticipated the radical program of public sector reform introduced by the Kennett government. A commitment to downsizing, markets and privatisation has transformed employment relations in the Victorian public sector. Familiar institutions have disappeared, major employment areas have been restructured, and jurisdiction for much public sector industrial relations has been transferred to the Commonwealth. Despite some industrial unrest, and occasional successes, public sector unions have been unable to fend off this ideological assault on traditional patterns of public sector employment. 相似文献