全文获取类型
收费全文 | 1589篇 |
免费 | 36篇 |
国内免费 | 1篇 |
专业分类
各国政治 | 66篇 |
工人农民 | 46篇 |
世界政治 | 70篇 |
外交国际关系 | 76篇 |
法律 | 969篇 |
中国共产党 | 54篇 |
中国政治 | 97篇 |
政治理论 | 123篇 |
综合类 | 125篇 |
出版年
2023年 | 5篇 |
2022年 | 10篇 |
2021年 | 14篇 |
2020年 | 31篇 |
2019年 | 26篇 |
2018年 | 30篇 |
2017年 | 26篇 |
2016年 | 36篇 |
2015年 | 26篇 |
2014年 | 26篇 |
2013年 | 98篇 |
2012年 | 47篇 |
2011年 | 55篇 |
2010年 | 74篇 |
2009年 | 54篇 |
2008年 | 72篇 |
2007年 | 53篇 |
2006年 | 80篇 |
2005年 | 94篇 |
2004年 | 61篇 |
2003年 | 53篇 |
2002年 | 47篇 |
2001年 | 123篇 |
2000年 | 70篇 |
1999年 | 78篇 |
1998年 | 36篇 |
1997年 | 6篇 |
1996年 | 3篇 |
1995年 | 8篇 |
1994年 | 5篇 |
1993年 | 9篇 |
1992年 | 22篇 |
1991年 | 19篇 |
1990年 | 41篇 |
1989年 | 28篇 |
1988年 | 29篇 |
1987年 | 23篇 |
1986年 | 15篇 |
1985年 | 13篇 |
1984年 | 8篇 |
1983年 | 10篇 |
1982年 | 11篇 |
1981年 | 8篇 |
1980年 | 4篇 |
1979年 | 11篇 |
1978年 | 7篇 |
1973年 | 2篇 |
1971年 | 4篇 |
1970年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有1626条查询结果,搜索用时 15 毫秒
131.
家兔死后眼玻璃体液锌、镍含量与 PMI关系的研究 总被引:6,自引:3,他引:3
目的寻找一种精确推定PMI的方法。方法应用电感耦合等离子体质谱(ICP-MS),检测了家兔死后96小时内眼玻璃体液锌、镍元素含量,探讨其与PMI的相关性。结果家兔死后24h内眼玻璃体液锌、镍元素含量与PMI显著相关,可作为推定早期PMI的参考指标,其二项式回归方程分别为y=0.1404x2-1.3351x+3.8298(R2=0.9202)、y=0.0043x2-0.0596x+0.2665(R2=0.9103)。结论家兔眼玻璃体液中Zn、Ni元素含量变化是推定早期PMI的参考指标之一。 相似文献
132.
133.
134.
廖毅文 《南京政治学院学报》2001,17(5):101-103
军事新闻宣传传统的宣传模式和新闻理念面对不断发展变化的受众群体显露出强烈落差和不足 :宣传报道面窄 ,难以全面反映部队丰富多彩的生活和官兵的精神风貌 ;行政干预和人为操作取代新闻规律的现象时有发生 ;典型宣传数量多 ,质量不高 ;手法陈旧 ,模式老套。面临着新时期为“打得赢”提供强大精神动力 ,为“不变质”提供可靠政治保证 ,军事新闻宣传亟需改进与加强。 相似文献
135.
福建省违法犯罪青少年的个性特征研究 总被引:5,自引:0,他引:5
为探讨青少年违法犯罪与个性的关系,采用艾森克个性问卷对621名13-19岁违法犯罪青少年和1371名相应年龄在校学生按不同年龄段和性别进行对照研究,发现16-19岁男性违法犯罪青少年外向性(E)、精神质(P)评分显著高于对照组(P<0.01),13-15岁男性违法犯罪少年精神质(P)、神经质(N)评分显著高于对照组(P<0.01),16-19岁女性违法犯罪青少年神经质(N)评分低于对照组(P<0.05),不同违法犯罪类型之间各个维度无统计学差异,表明外向性、精神质和神经质与男性青少年违法犯罪相关,倾稳性可能与女性青少年违法犯罪有关。 相似文献
136.
The morphologic changes of the closed injured brain of rats were observed by SEM. The rats either died immediately after conclusive injuries or were killed after 5 minutes to 5 days after injuries. The main changes were as follows: the diffuse disorder, twist, wave-like distortion and break of neuron fibers; axonal swelling; formation of axonal retraction balls; stripping and denotation of myelin sheath The ball-like swelling of neuron, break of neuron membrane and vascular wall, and microthrombus formations were also observed. These damages worsened with prolongation of surviving time of the rats. The axonal retraction ball appeared 8 hours after the injury and was approximately 3-5 cm in diameter, and developed to 7-8 cm after 3-5 days. It is observed that frontal lobe, cerebellum and brain stem were severely damaged. 相似文献
137.
Pathological changes of pancreas in 22 cases died of intoxication were studied and the mechanism was discussed. The results showed that: in death cases by eating of toxicants, the hemorrhage and necrosis of pancreas is extensive mainly in caput and corpus, while inhaling of carbon monoxide is focal in corpus and cauda. 相似文献
138.
Polymorphism and haplotype study of Y-chromosomal multi-STRs loci in Han population in Guangzhou 总被引:2,自引:0,他引:2
Using polymerase chain reaction and silver stain, polymorphism and haplotype study of Y-chromosomal multi-STRs loci: DYS19, DYS389I/II, DYS390 were studied. 111 samples of male were collected from Guangzhou area. 5 alleles were determined in DYS19 locus, 4 alleles in DYS389I locus, 5 alleles in DYS389II locus and 5 alleles in DYS390 locus. Compared with other racial populations, differences of distribution of allele frequencies existed significantly. 72 haplotype were present in this study. 相似文献
139.
The Fx5 Fibre Finder has been developed by Foster & Freeman Ltd to automatically search tape lifts for coloured fibres specified by the operator. Experiments and casework studies have been conducted to assess primarily the performance of the instrument but also, where possible, to compare it with manual searching. Tape lifts have always been manually searched at this laboratory and it is a laborious task. The use of a machine such as the Fx5 would release a scientist from many hours of low power microscopy to be free for other duties and therefore could be a valuable labour saving device in forensic textile examination. 相似文献
140.
Taphonomy of marine environments has been studied mostly from individual cases. The formation of adipocere, or "grave-wax," is an important indicator of the postmortem interval. In the present paper, the conditions and the timing of adipoceric formation are observed in a series of 15 cadavers recovered at different times, over a period of 433 days, from the same contained environment. Initial foci of adipocere on the subcutaneous tissue of the cadavers were detected as early as 38 days from the time of immersion in cold (10-12 degrees C) sea water. The discrepancies between our findings and previous reports on the correlation between time since death and decomposition stages in marine environments are discussed. 相似文献