首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   566篇
  免费   17篇
各国政治   46篇
工人农民   28篇
世界政治   61篇
外交国际关系   33篇
法律   256篇
中国政治   3篇
政治理论   136篇
综合类   20篇
  2021年   5篇
  2020年   6篇
  2019年   7篇
  2018年   19篇
  2017年   19篇
  2016年   13篇
  2015年   19篇
  2014年   14篇
  2013年   90篇
  2012年   14篇
  2011年   17篇
  2010年   12篇
  2009年   16篇
  2008年   16篇
  2007年   21篇
  2006年   19篇
  2005年   12篇
  2004年   16篇
  2003年   15篇
  2002年   17篇
  2001年   7篇
  2000年   14篇
  1999年   8篇
  1998年   12篇
  1997年   13篇
  1996年   12篇
  1995年   13篇
  1994年   6篇
  1993年   7篇
  1992年   8篇
  1991年   9篇
  1990年   9篇
  1989年   6篇
  1988年   5篇
  1987年   7篇
  1986年   10篇
  1985年   2篇
  1984年   11篇
  1983年   6篇
  1982年   2篇
  1981年   9篇
  1980年   5篇
  1979年   4篇
  1978年   4篇
  1977年   8篇
  1976年   3篇
  1974年   2篇
  1973年   3篇
  1972年   5篇
  1971年   2篇
排序方式: 共有583条查询结果,搜索用时 15 毫秒
291.
292.
DNA genotyping of unbuffered formalin fixed paraffin embedded tissues   总被引:1,自引:0,他引:1  
Formalin-induced DNA degradation was studied at different fixation times (3, 7, 16 and 32 days) each on 10 formalin fixed paraffin embedded tissues (FFPET) stored for 15 years at room temperature.The four different extraction protocols used in this study showed that Chelex100 extracts performed the best at 3 and 7 days of formalin fixation (DFF) (with regard to the quantity and the quality of the DNA). However, Qiamp extracts showed better results for long sized alleles, as well for single polymerase chain reaction (PCR) amplifications after 16 and 32 DFF, as for multiplex PCR at shorter fixation times. DNA degradation is expressed by the size of the amplified alleles, only 100 bp templates surviving after 32 DFF (AMG locus). Single locus amplifications (CD4 and FES/FPS alleles) performed better than multiplex PCR (ProfilerPlus), with nearly 100% positive results at 7 DFF. In both types of amplifications, the success rate decreased proportionally with the time of formalin fixation and, consequently, with the size of the required DNA template.  相似文献   
293.
Palestinian society and economy are slowly being dismembered. The transformations in land, labor, demography, and society have been stunning. The current context has many dimensions but is defined primarily by Israel's continued occupation of Palestinian lands. That context is also defined by the deterioration of the Palestinian economy, a humanitarian crisis characterized in large part by levels of impoverishment and social decline that have no parallel during Israel's 36-year occupation of the West Bank and Gaza, and the destruction of ordinary life. Not since 1948, perhaps, have Palestinians faced such conditions of loss and dispossession. Left unaddressed (as they are by the current US road map), these conditions will not only preclude a peaceful resolution to the Palestinian-Israeli conflict, but also seriously constrain Palestinian socioeconomic recovery and development.  相似文献   
294.
295.
296.
Shortly after the end of the Second World War six Allied and Soviet Military Liaison Missions were established on the territory of the former Third Reich. The British contribution to this was known as BRIXMIS, the British Commanders ‘‐in‐Chief Mission to the Soviet Forces in Germany. However, after a short time liaison was not the only activity, espionage inevitably became the most important function of BRIXMIS. One of the more important and dangerous operations was the acquisition of aerial intelligence of Soviet installations in East Germany and East Berlin taking photography with hand‐held cameras from a single‐engined Chipmunk aircraft which was ostensibly used by the RAF for training purposes.  相似文献   
297.
298.
正The leaders of three countries—President Joe Biden of the United States, Prime Minister Boris Johnson of the United Kingdom and Prime Minister Scott Morrison of Australia declared the establishment of a military alliance known as AUKUS—which stands for Australia, UK and U.S.—on September 15. Among the consensus reached within AUKUS is the allocation of nuclear-powered submarine technology from the U.S. to Australia. In addition,  相似文献   
299.
The legal debate about patient autonomy focuses mainly on mental capacity and provision of information. The influence of the family on the decisions of the competent adult patient has scarcely been discussed in English medical law. Dominated by the bioethical principle of individual autonomy, the law concentrates on the patient and takes an exclusionary stand regarding relatives. Hence, the aim of this article is to examine the attitude of English law towards the involvement of relatives when patients make decisions, and to investigate the views and experiences of patients and their relatives in reality. To fulfil this aim, a qualitative study was carried out in six NHS trusts in England. The study was based on in-depth interviews conducted with patients who suffer from long-term illnesses, and their relatives. In the interviews, patients stated that the relatives assisted them in making informed decisions about treatment. Patients said that relatives had an influence on the decision-making process and on the decision itself, but also reported that ultimately relatives left the final decision to the patient. The findings reflect a relational approach to patient autonomy. When making decisions about treatment, patients needed to know that their relatives would support them no matter what they decided. However, exceptional cases which demonstrated substantial familial influence suggest that the law should secure the patient's interest in making their own decisions. In light of these findings, it is argued that the current exclusionary attitude expressed in English medical law towards the role of relatives should be changed.  相似文献   
300.
Academic debate on public utility regulation has considerably evolved over the past 50 years. The conflict between the supporters of franchise regulation and commission regulation has given way to much more balanced in-depth analyses. Regulation is defined on the basis of its structure but also its scope and regulation incentives. A regulation mode must above all be evaluated with regard to the institutional environment. We propose a neo-institutionally-inspired analysis framework and show how the dynamic relationship between regulation and the institutional environment can lead to reforms and ultimately to more efficient regulation. The findings of a French water utility sector analysis underline how a series of national normative reforms and local exploratory reforms can give rise to innovations in the regulation mode. This new hybrid regulation, between commission regulation and franchise bidding, could be more effective than previous regulation mode, i.e. more stable and in line with stakeholders’ expectations.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号