全文获取类型
收费全文 | 14011篇 |
免费 | 422篇 |
专业分类
各国政治 | 843篇 |
工人农民 | 577篇 |
世界政治 | 1113篇 |
外交国际关系 | 554篇 |
法律 | 8091篇 |
中国共产党 | 3篇 |
中国政治 | 170篇 |
政治理论 | 2956篇 |
综合类 | 126篇 |
出版年
2020年 | 204篇 |
2019年 | 217篇 |
2018年 | 298篇 |
2017年 | 335篇 |
2016年 | 333篇 |
2015年 | 301篇 |
2014年 | 301篇 |
2013年 | 1659篇 |
2012年 | 364篇 |
2011年 | 448篇 |
2010年 | 346篇 |
2009年 | 343篇 |
2008年 | 375篇 |
2007年 | 364篇 |
2006年 | 358篇 |
2005年 | 328篇 |
2004年 | 353篇 |
2003年 | 360篇 |
2002年 | 278篇 |
2001年 | 522篇 |
2000年 | 490篇 |
1999年 | 414篇 |
1998年 | 220篇 |
1997年 | 164篇 |
1996年 | 159篇 |
1995年 | 160篇 |
1994年 | 159篇 |
1993年 | 157篇 |
1992年 | 249篇 |
1991年 | 240篇 |
1990年 | 250篇 |
1989年 | 232篇 |
1988年 | 243篇 |
1987年 | 235篇 |
1986年 | 257篇 |
1985年 | 251篇 |
1984年 | 224篇 |
1983年 | 225篇 |
1982年 | 145篇 |
1981年 | 112篇 |
1980年 | 122篇 |
1979年 | 143篇 |
1978年 | 131篇 |
1977年 | 98篇 |
1976年 | 101篇 |
1975年 | 102篇 |
1974年 | 106篇 |
1973年 | 98篇 |
1972年 | 94篇 |
1969年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
Local government reforms in contemporary Russia are placed in the broader contexts of political reform under Putin and the historical relationship between local administration and the state. Reforms of local government thus help illuminate the architecture of contemporary state building in Russia and the degree to which contemporary Russia perpetuates political traditions. This study reviews the antecedent action in local government prior to the Putin era. It then examines the Kozak Commission and the new law on local government, assessing the strengths and weaknesses of these reforms. Finally, this study examines the challenges of implementing the reforms and what these challenges tell us about devolution and centralisation under Putin. 相似文献
32.
33.
A fatality following ingestion of the drug baclofen (Lioresal) is described. Baclofen was identified in urine by gas chromatography/mass spectrometry. After derivatization with trinitrobenzene sulfonic acid, baclofen was quantitated in serum and urine by high-performance liquid chromatography. The concentration of baclofen was 17 mg/L in serum and 760 mg/L in urine collected approximately 12 h after the overdose. To our knowledge, this is only the second reported fatality involving a baclofen overdose. The previous case did not include quantitation of baclofen in any biological fluid. 相似文献
34.
35.
We investigated the differences in the levels of carboxyhemoglobin (COHb), cyanide (HCN) and petroleum fuels (gasoline and kerosene) between left and right ventricular bloods from fire victims. COHb was slightly, and HCN and petroleum fuels were markedly higher levels in the left than those in the right. These effects were so called 'first pass phenomena' due to the circulation, diffusion and metabolization before the deaths of fire victims. 相似文献
36.
37.
D.S.T Lo T.C Chao S.E Ng-Ong Y.J Yao T.H Koh 《Forensic Science International Supplement Series》1997,90(3):626
Blood previously acidified with aqueous saturated ammonium chloride solution was extracted with ethyl acetate. The dried extract was subjected to acetonitrile–hexane partition. The acetonitrile portion was analysed for the presence of acidic and neutral drugs by HPLC–DAD (200 mm×2.1 mm I.D. microbore ODS-Hypersil column) and GC–FID (25 m narrow-bore×0.25 mm I.D. HP-5 column with 0.33 μm film thickness). The protocol was found to be suitable for both clinical toxicology (including emergency toxicology) and postmortem toxicology. At least 66 drugs of interest were unequivocally identified by RRTs (HPLC) and UV spectra (DAD) match while another 12 were unequivocally identified by double RRTs match (HPLC and GC). Quantitation was facilitated by incorporating calibration blood standards in each assay batch. The five drugs most commonly encountered in clinical blood specimens (1150 cases) were: paracetamol (47.4% of the cases); chlormezanone (6.6%), theophylline (1.74%), naproxen (1.65%) and mefenamic acid (1.56%). The following drugs were detected in toxicologically significant quantities in postmortem blood specimens (245 cases): phenobarbitone (1.22% of the cases), naproxen (0.82%), chlormezanone (0.82%), theophylline (0.82%), carbamazepine (0.41%) and paracetamol (0.41%). 相似文献
38.
39.
Isolation of the DNA minisatellite probe MZ 1.3 and its application to DNA 'fingerprinting' analysis 总被引:1,自引:0,他引:1
U Schacker P M Schneider B Holtkamp E Bohnke R Fimmers H H Sonneborn C Rittner 《Forensic science international》1990,44(2-3):209-224
A minisatellite probe, MZ 1.3, detecting hypervariable fragment patterns was isolated from a human genomic library. A repetitive sequence of 27 bp length was identified which is contained in the probe approx. 40 times. The MZ 1.3 repeat shows variable homology of 53-73% to the repetitive sequence of the protein III gene of the bacteriophage M13 genome. Polymorphic restriction fragment patterns were found with MZ 1.3 using the enzymes Hinf I, BstN I, Hae III, Mbo I, PstI/Pvu II, and Rsa I. An average of 18 polymorphic fragments was observed using Hinf I as enzyme. The band sharing frequency after Hinf I digestion among unrelated individuals was determined to be 23.8 +/- 7.2%. An example for the application of MZ 1.3 to paternity testing in an incest case is given. The probe can be used with radioactive or non-radioactive detection systems. An approach is presented to compare polymorphic fragment patterns from individuals obtained by independent gel runs on the basis of relative band positions (RBP) and calculated in a computerized analysis. 相似文献
40.