全文获取类型
收费全文 | 4697篇 |
免费 | 285篇 |
国内免费 | 1篇 |
专业分类
各国政治 | 355篇 |
工人农民 | 11篇 |
世界政治 | 640篇 |
外交国际关系 | 763篇 |
法律 | 1792篇 |
中国共产党 | 304篇 |
中国政治 | 556篇 |
政治理论 | 211篇 |
综合类 | 351篇 |
出版年
2023年 | 28篇 |
2022年 | 29篇 |
2021年 | 17篇 |
2020年 | 27篇 |
2019年 | 40篇 |
2018年 | 51篇 |
2016年 | 32篇 |
2015年 | 36篇 |
2014年 | 160篇 |
2013年 | 112篇 |
2012年 | 296篇 |
2011年 | 307篇 |
2010年 | 188篇 |
2009年 | 156篇 |
2008年 | 213篇 |
2007年 | 228篇 |
2006年 | 239篇 |
2005年 | 200篇 |
2004年 | 189篇 |
2003年 | 205篇 |
2002年 | 199篇 |
2001年 | 143篇 |
2000年 | 137篇 |
1999年 | 100篇 |
1998年 | 78篇 |
1997年 | 75篇 |
1996年 | 69篇 |
1995年 | 82篇 |
1994年 | 79篇 |
1993年 | 50篇 |
1992年 | 54篇 |
1991年 | 56篇 |
1990年 | 52篇 |
1989年 | 63篇 |
1988年 | 101篇 |
1987年 | 80篇 |
1986年 | 82篇 |
1985年 | 90篇 |
1984年 | 87篇 |
1983年 | 88篇 |
1982年 | 59篇 |
1981年 | 59篇 |
1980年 | 80篇 |
1979年 | 39篇 |
1964年 | 21篇 |
1962年 | 17篇 |
1961年 | 14篇 |
1959年 | 17篇 |
1957年 | 15篇 |
1956年 | 13篇 |
排序方式: 共有4983条查询结果,搜索用时 15 毫秒
961.
2007年,在欧盟(EU)和安第斯国家共同体(Andean Community of Nations,CAN)为达成自由贸易协定而进行的谈判中,玻利维亚和厄瓜多尔的代表团提出了一项替代方案,该方案动摇了谈判的基础,使之超出由欧盟提出的激进的贸易和投资自由化议程。①数月之后,在欧盟、拉丁美洲和加勒比地区国家首脑参加的峰会上,争执被公之于众,并很快受到为抗议谈判而汇集到利马的各种社 相似文献
962.
很多当代叙事学家都认为所有的虚构叙事都有一个不同于作者的虚构叙述者。这一观点被称为“泛叙述者论”。本文以充分的理由驳斥了这一观点,同时指出那些看似支持这一观点的重要论据是根本站不住脚的。在简要介绍小说理论的基础上,文章认为,无论从理论还是从实践角度来说,都没有必要为每个虚构叙事假定一个虚构叙述者。 相似文献
963.
964.
近年来,卡莱斯·博伊克斯(Carles Boix)、达龙·埃斯莫格卢(Daron Acemoglu)以及詹姆斯·罗宾逊(James Robinson)的研究聚焦于朝向和背离民主制转型过程中不平等和分配冲突所扮演的角色。我们可以使用从1980年到2000年之间"第三波"浪潮中关于民主转型和回潮的一个原始的定性数据,通过因果过程的观察来评估他们的主张。我们发现分配冲突作为他们理论中关键的因果分析机制,只出现在刚刚超过一半的案例中。与理论上的预期不同的是,大量的这类转型发生在那些高度不平等的国家中。在所有发生民主回潮的国家中低于1/3的民主回潮是由精英和大众之间的分配冲突所驱动的。我们认为关于民主转型和民主回潮两个问题都存在着许多其他的替代性的因果分析途径。 相似文献
965.
966.
Zhu BL Ishida K Oritani S Quan L Fujita MQ Maeda H Ogawa M Tanaka N Komura S Tsuji T 《Forensic science international》2001,117(3):205-212
To evaluate the immunohistochemical distribution of pulmonary surfactant-associated protein A (SP-A) in fatal poisoning in relation to the effects of drugs and poisons on respiratory function, 42 forensic autopsy cases were examined by scoring the staining intensity. The highest scores of SP-A staining, with dense granular deposits (aggregates) in the intra-alveolar space, were observed in fatalities from pancuronium bromide (muscle relaxant) injection and petroleum (butane) gas inhalation. Poisoning with organophosphate pesticides and arsenic (ingestion) showed a second grade SP-A score. However, The SP-A scores were relatively low in ethanol and sedative-hypnotic intoxication. Carbon monoxide intoxication showed a varied degree of SP-A score, and the aggregated SP-A score tended to be higher in cases of lower blood carboxyhemoglobin concentration. A varied SP-A score was also observed in methamphetamine fatalities, in which the score was relatively low in cases with a higher serum drug level. Increase of SP-A was not always associated with the intra-alveolar effusion or hemorrhages. The above-described observations suggested that the immunohistochemical score of SP-A may be a possible indication for intensity and duration of drug/poison-dependent respiratory distress. 相似文献
967.
Two hundred prepaid cards, which had been used in Nagoya-city's subway in Japan, and another 32 prepaid cards (11 were real turnpike cards, 20 were counterfeit cards and 1 was a white card) were evaluated by X-ray fluorescence (XRF) without any pre-treatment. A preliminary investigation was performed on 200 prepaid cards in order to find an identification method for the turnpike cards. By plotting the relative intensity of titanium versus that of iron obtained by XRF, the cards were clearly classified into seven groups. On the other hand, the cards could be divided into four groups by a multivariate analysis using the relative intensities of five elements such as chlorine, calcium or tin, titanium, iron and barium. Using these results to classify the Japanese turnpike cards, they were divided into three groups or two groups. One of three groups or two groups was the counterfeit card group. 相似文献
968.
969.
Rhabdomyolysis has repeatedly been reported as a possible consequence of illicit drug consumption especially in clinical literature. In order to investigate the prevalence of rhabdomyolysis in cases of drug deaths, immunohistochemical staining of kidney sections with a myoglobin antibody was performed at 103 consecutive fatal drug poisonings. The control group consisted of 107 unselected forensic autopsies. With regard to the presence of intratubular myoglobin, 33% of the study group were categorized as "strongly positive", 17.5% as "slightly positive" and 49.5% as "negative". No single substance showed a particularly high incidence of rhabdomyolysis nor were there correlations to special combinations of substances. In the control group a "strongly positive" result after myoglobin staining was observed in only 10.3% of 107 cases, a "slightly positive" result in 13.1% and a "negative" result in 76.6%. The findings suggest that rhabdomyolysis is a frequent consequence of illicit drug consumption and that it is not promoted by a single factor, but by a combination of several factors. 相似文献
970.
Genotype polymorphism studies at nine short tandem repeat (STR) loci (D3S1358, FGA, TH01, D7S820, VWA, CSF1PO, D5S818, D13S317, TPOX) were carried out in two Ethnic Groups (Tu, Sala) living in Qinhai, a North-West province of China. All loci were in accordance with Hardy-Weinberg equilibrium (P = 0.05). 相似文献