全文获取类型
收费全文 | 3585篇 |
免费 | 72篇 |
国内免费 | 3篇 |
专业分类
各国政治 | 92篇 |
工人农民 | 67篇 |
世界政治 | 89篇 |
外交国际关系 | 290篇 |
法律 | 1286篇 |
中国共产党 | 316篇 |
中国政治 | 424篇 |
政治理论 | 228篇 |
综合类 | 868篇 |
出版年
2022年 | 29篇 |
2021年 | 60篇 |
2020年 | 73篇 |
2019年 | 24篇 |
2018年 | 39篇 |
2017年 | 55篇 |
2016年 | 40篇 |
2015年 | 80篇 |
2014年 | 86篇 |
2013年 | 173篇 |
2012年 | 145篇 |
2011年 | 229篇 |
2010年 | 253篇 |
2009年 | 277篇 |
2008年 | 248篇 |
2007年 | 258篇 |
2006年 | 358篇 |
2005年 | 237篇 |
2004年 | 142篇 |
2003年 | 130篇 |
2002年 | 134篇 |
2001年 | 171篇 |
2000年 | 72篇 |
1999年 | 63篇 |
1998年 | 27篇 |
1997年 | 15篇 |
1996年 | 8篇 |
1995年 | 10篇 |
1994年 | 6篇 |
1993年 | 11篇 |
1992年 | 15篇 |
1991年 | 12篇 |
1990年 | 23篇 |
1989年 | 7篇 |
1988年 | 14篇 |
1987年 | 6篇 |
1986年 | 11篇 |
1985年 | 11篇 |
1984年 | 7篇 |
1983年 | 11篇 |
1982年 | 8篇 |
1981年 | 7篇 |
1980年 | 9篇 |
1979年 | 5篇 |
1978年 | 9篇 |
1976年 | 5篇 |
1973年 | 5篇 |
1972年 | 5篇 |
1967年 | 5篇 |
1965年 | 6篇 |
排序方式: 共有3660条查询结果,搜索用时 0 毫秒
991.
关于完善我国独立董事制度的若干问题探讨 总被引:1,自引:0,他引:1
林娜 《中共福建省委党校学报》2002,(12):41-44
独立董事制度在我国遇到的是一个特殊的制度环境,要想发挥其应有的作用,完善我国的独立董事制度,还需要突破许多制度障碍。当前迫切需要解决的问题,主要集中在独立董事所面对的我国上市公司普遍存在的特殊的股权结构问题、独立董事的独立性问题以及独立董事与监事会的职能协调问题。 相似文献
992.
In this study, 13C4-secobarbital was used as an exemplar compound to illustrate the mechanism based on which the effectiveness of a proposed internal standard (IS) could be evaluated. A deuterated analog, 2H5-secobarbital, was also studied in parallel for comparison purposes. Well-established solid-phase extraction and methylation procedures were used prior to the GC/MS measurement step. The contribution of the intensity of an ion designated for the analyte (secobarbital) by the proposed IS, and similarly, the contribution of the intensity of an ion designated for the IS by the analyte--a phenomenon termed "cross-contribution"-were evaluated based on a "direct measurement" procedure in which equimolar amounts of the analyte and the IS were used to generate intensity data. These intensity data were then used as the basis for the calculation of "cross-contribution" (in percentages) of ions designated for the analyte and the IS. Cross-contribution data were compared with the linearity data resulting from two series of standards containing 25 to 9600 ng/mL secobarbital using two sets of quantitation ion pairs--m/z 196/200 and 195/199 with 13C4-secobarbital as the IS and m/z 196/201 and 195/200 with 2HS-secobarbital as the IS. 13C4-secobarbital was found to be much less problematic and thus can serve as a very effective IS. Cross-contribution data alone cannot fully explain the observed differences resulting from the use of these two ISs; further systematic study is needed to provide better understanding of the underlying interference mechanism. 相似文献
993.
Previously, we examined the expression of C-reactive protein (CRP) in hepatic tissues in fatal injuries (injury deaths) immunohistochemically, and classified the CRP distribution into three patterns: diffuse (D-) pattern, diffuse with strong positivity in the hepatic lobules; periportal (PP-) pattern, characterized by positive cells in the periportal region of some lobules; focal (F-) pattern, showing small islands of positive cells in some lobules. There was a relationship between the CRP distribution and the survival time. In this study, we further analyzed the deaths including those due to other than fatal injuries (non-injury deaths), and a study of a total of 314 deaths from various causes was performed. Generally, non-injury deaths showed findings similar to those in injury deaths. PP- and/or F-patterns were observed in 43.7% of cases having a short survival time (<6 h), but found in only 3% of those surviving longer (>6 h), showing that such findings are suggestive of a short survival time. D-pattern was found more frequently in non-acute deaths (60.4%), than in acute deaths (10.9%). In acute deaths, D-pattern was found in some cases showing extensive tissue injuries, such as burns and polytrauma, and inflammative predisposition. Immunohistochemical findings also showed some correlation with the serum CRP level. Our data suggest that hepatic CRP immunohistochemistry may be a useful tool for elucidating the dying process. 相似文献
994.
995.
Death of a worker occurred after ingestion of unknown amounts of Nicotiana glauca G leaves. The leaves were cooked after having been mistakenly considered to be spices of a type which grow in Thailand. After ingestion, two Thai workers collapsed, one with asystolia. Resuscitation efforts were successful only for one of the victims. A GC/MS method was used for the identification of anabasine as the main constituent in the leaves, food extract, blood, and the urine of the deceased. Lacking a standard, it was necessary to interpret the GC/MS spectrum to identify anabasine and establish its presence. 相似文献
996.
Pulmonary surfactant-associated protein A levels in cadaveric sera with reference to the cause of death 总被引:4,自引:0,他引:4
Pulmonary surfactant-associated protein A (SP-A) is an exclusively lung specific protein, and is considered to leak into the blood stream in alveolar septal damage. In this study we examined the serum SP-A level in forensic autopsy materials using an enzyme immunoassay with monoclonal antibodies to assess the postmortem level in relation to the cause and mode of death. Although a gradual postmortem degradation should be taken into consideration, topological relationship of serum level seemed to be fairly stable (arterial> or =venous blood in most cases), indicating no evident influence of postmortem diffusion. Significant elevation of serum SP-A (76.7-250 ng/ml in left heart blood) was observed in hyaline membrane diseases from various causes independent of the postmortem intervals (<30 h). However, mean SP-A levels in postmortem heart blood were usually low in asphyxia including hanging, strangulation and choking (left, 25.5 ng/ml; right, 22.3 ng/ml), polytrauma (left, 13.1 ng/ml; right, 9.0 ng/ml) and stab wound to the neck (left, 34.1 ng/ml; right, 29.4 ng/ml). Prominent elevation was noted in a case of fatal strangulation with complication of idiopathic interstitial pneumonia, and also in some deaths due to drowning, burns in fires, blunt and gunshot chest injuries. These findings indicated that postmortem elevation of serum SP-A levels was associated with alveolar septal damage due to inflammation, mechanical and physical stresses, which caused leakage of SP-A into the bloodstream. 相似文献
997.
比较D1S80 ,DQA1+PM和CTT等位点在法医物证鉴定中应用情况 ,经研究发现 ,D1S80位点识别能力较强 ,基因遗传稳定 ,其电泳检测操作简单 ,易推广 ;DQA1+PM位点扩增片段较短 ,反向斑点杂交法灵敏度高 ,特别适用于陈旧、降解和微量生物检材的鉴定 ;CTT位点的荧光检测法稳定、可靠 ,实验结果便于保存和管理。总之 ,D1S80、DQA1+PM和CTT位点的遗传符合孟德尔定律 ,分型简便、可靠 ,在亲子鉴定和个人识别中发挥重要作用。 相似文献
998.
用反相杂交技术对HLA-DQA1基因分型及其应用 总被引:2,自引:0,他引:2
目的 :HLA -DQA1其因的分型研究及在实际办案中的应用。方法 :PCR结合反相杂交检测技术对HLA -DQA1基因进行分型。结果 :检见7种基因 ,24种基因型 ,获得上海地区HLA -DQA1基因的基因频率及基因型的频率分布数据。结论 :对法医学中常见的血液 (痕 )、牙齿、精斑、混合斑、人体组织等检材进行HLA -DQA1分型检测 ,其结果稳定可靠 ,为实际办案提供了科学依据 相似文献
999.
1000.