全文获取类型
收费全文 | 10251篇 |
免费 | 220篇 |
专业分类
各国政治 | 463篇 |
工人农民 | 280篇 |
世界政治 | 594篇 |
外交国际关系 | 366篇 |
法律 | 6862篇 |
中国共产党 | 1篇 |
中国政治 | 35篇 |
政治理论 | 1743篇 |
综合类 | 127篇 |
出版年
2020年 | 91篇 |
2019年 | 115篇 |
2018年 | 167篇 |
2017年 | 169篇 |
2016年 | 208篇 |
2015年 | 136篇 |
2014年 | 174篇 |
2013年 | 993篇 |
2012年 | 274篇 |
2011年 | 311篇 |
2010年 | 224篇 |
2009年 | 220篇 |
2008年 | 282篇 |
2007年 | 274篇 |
2006年 | 273篇 |
2005年 | 220篇 |
2004年 | 258篇 |
2003年 | 249篇 |
2002年 | 255篇 |
2001年 | 430篇 |
2000年 | 387篇 |
1999年 | 305篇 |
1998年 | 98篇 |
1997年 | 118篇 |
1996年 | 90篇 |
1995年 | 98篇 |
1994年 | 105篇 |
1993年 | 106篇 |
1992年 | 207篇 |
1991年 | 246篇 |
1990年 | 226篇 |
1989年 | 250篇 |
1988年 | 237篇 |
1987年 | 217篇 |
1986年 | 222篇 |
1985年 | 196篇 |
1984年 | 180篇 |
1983年 | 182篇 |
1982年 | 98篇 |
1981年 | 93篇 |
1979年 | 136篇 |
1978年 | 89篇 |
1977年 | 82篇 |
1976年 | 81篇 |
1975年 | 91篇 |
1974年 | 113篇 |
1973年 | 106篇 |
1972年 | 92篇 |
1971年 | 94篇 |
1970年 | 78篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
961.
962.
In 53 cases of death - including 12 cases of sudden infant death syndrome (SIDS) - where blood samples could be taken within 18 h postmortem, the thyroxines T4, FT4, T3 and FT3 were determined (ELISA and RIA). These hormone values were compared with the corresponding histological thyroid findings in 43 cases (11 SIDS, 32 controls). Nearly identical T4 and FT4 mean values were found in both groups which were within the norms. In contrast to the average values of the control group, the T3 and FT3 concentrations of the SIDS group showed an increase of 3.7-fold and 1.9-fold. Accordingly, histological examination of the SIDS group showed highly activated and extensively released follicles whereas normal colloidal-containing follicle structures were observed in nearly all control cases. The present findings indicate that neither postmortem T4 T3 conversion nor intensified agonal hormone secretion is likely to be the only cause of the increasing T3 and FT3 values. In SIDS cases chronic or recurring chronic stress situations are supposed to be the cause for the hormonal and histological thyroid findings. Some differential diagnoses are discussed. Within 18 h after death, increased concentrations of T3 and FT3, together with simultaneous colloid release, represent a diagnosis of SIDS. 相似文献
963.
964.
965.
M L Radelet G W Barnard 《The Bulletin of the American Academy of Psychiatry and the Law》1986,14(1):37-53
For the last several centuries, most jurisdictions using capital punishment have had formal or informal rules that prohibit the execution of the mentally ill. In this article, the procedures for such exclusions in Florida are examined. The article begins by attempting to answer the question of why legislators and judges, at least nominally, have prohibited the execution of the mentally ill. Next, Florida's criteria for defining and procedures for excluding mentally ill prisoners are examined and found to be vague. We then turn attention to the ethical problems created by the statute and its implementation that face the participating psychiatrists and the profession. These problems are compounded because the physician's findings are not acted upon by politically neutral authorities and the inmate has no opportunity to challenge the findings with his own panel of experts. Finally, since any exclusion of the mentally ill from execution is temporary and the patient will be executed if he recovers, the dilemmas facing the treatment staff if the death sentence is not commuted to life imprisonment before treatment are discussed. 相似文献
966.
967.
The purpose of this paper is to see how economic factors determine prices in the previously communist countries undergoing privatization. This does not concern the auctions of big state enterprises where the prices are found to be rigged. In this paper we estimate hedonic price functions based on a unique data set on auction prices of apartments in Moscow. We collected the data ourselves by attending the auctions and gathered data on the characteristics. We estimated the hedonic equations using a disequilibrium approach because no equilibrium prices were observed for large number of apartments that were withdrawn from the auction. We found that, as the privatization of residential housing was carried out, the hedonic price equations fit the data remarkably well. 相似文献
968.
俄罗斯自然科学家齐奥尔科夫斯基是宇航学的奠基人,他通过宇航学影响了我们每个人的生活。他的宇宙哲学内涵丰富,既包含了宗教、哲学内容,同时又为人类指出一条通往"完善、美好未来"之路——飞向宇宙,是关于整个人类未来的庞大计划。通常认为,齐氏在技术文明理想和准则基础上制订的庞大的改造地球、征服宇宙计划,预言了当今时髦的稳定发展的思想。但是,齐氏提出的改造地球计划是极度反生态的,而且试图通过人类的宇宙扩张解决全球问题,目前看来存在很多问题。因此,摆在人类面前的任务是寻找符合后工业时代的理想和价值的、能够解决人类面临的全球危机的途径。 相似文献
969.
"莫言"的中文意思是"不说话",但实际上他的小说具有比一般讲故事的小说更具有震撼力。他的小说《酒国》以一种多视角的形式展现象征意义上的现实,让读者能够多视角地去解读中国的社会现实。 相似文献
970.
J J Kuhlman R W Mayes B Levine R Jones G N Wagner M L Smith 《Journal of forensic sciences》1991,36(5):1572-1579
Chloroquine concentrations in blood and tissues were examined in overdose and non-overdose cases to determine appropriate ranges for interpretation. Twenty-nine literature overdose cases and 8 non-overdose literature cases were compared with this laboratory's findings. The results indicate significant postmortem redistribution of chloroquine. Combining this laboratory's results and the literature results indicates that using a liver concentration of 150 mg/kg as a cutoff between overdose and non-overdose concentrations properly identified 30 of the 34 published cases containing liver chloroquine and 19 of the 20 presented cases. 相似文献