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   7202篇
  免费   178篇
各国政治   433篇
工人农民   314篇
世界政治   443篇
外交国际关系   272篇
法律   4441篇
中国政治   41篇
政治理论   1387篇
综合类   49篇
  2020年   71篇
  2019年   87篇
  2018年   119篇
  2017年   145篇
  2016年   149篇
  2015年   108篇
  2014年   139篇
  2013年   770篇
  2012年   149篇
  2011年   156篇
  2010年   151篇
  2009年   147篇
  2008年   178篇
  2007年   189篇
  2006年   191篇
  2005年   153篇
  2004年   145篇
  2003年   169篇
  2002年   135篇
  2001年   276篇
  2000年   233篇
  1999年   223篇
  1998年   95篇
  1997年   81篇
  1996年   74篇
  1995年   65篇
  1994年   75篇
  1993年   68篇
  1992年   125篇
  1991年   160篇
  1990年   155篇
  1989年   143篇
  1988年   149篇
  1987年   168篇
  1986年   161篇
  1985年   148篇
  1984年   131篇
  1983年   122篇
  1982年   81篇
  1981年   91篇
  1980年   69篇
  1979年   127篇
  1978年   86篇
  1977年   72篇
  1976年   56篇
  1975年   81篇
  1974年   86篇
  1973年   82篇
  1972年   56篇
  1971年   57篇
排序方式: 共有7380条查询结果,搜索用时 31 毫秒
221.
The research reported here is an analysis of the evolution of the relationships that comprise a single public health network, focusing especially on the position of the network administrative organization (Provan and Kenis 2008 Provan, K. G. and P. Kenis. 2008. “Modes of Network Governance: Structure, Management, and Effectiveness.” Journal of Public Administration Research and Theory 18(2): 229252.[Crossref], [Web of Science ®] [Google Scholar]) in the flow of knowledge among a large number of organizations providing similar services. Our study examines the North American Quitline Consortium (NAQC), a multi-sector network that spans the US and Canada and whose members provide telephone-based tobacco cessation services to anyone interested in quitting smoking. Data were collected using web-based surveys at three different points of time. Implications are discussed for network organizing, for both theory and practice, focusing especially on the importance of the network administrative organization in shaping the evolution of the whole network information flow.  相似文献   
222.
The maintenance of welfare state policies requires citizen support for the provision of a social safety net through taxation and redistribution. Research has shown that a diverse political polity presents a risk to the welfare state; however, Canada bucks the trend and does not see citizen support for economic redistribution decline in response to immigration-based population diversity. Using Canada as our case, we argue that scholars of welfare state politics and redistribution should turn their attention to other sources of population heterogeneity in an effort to better understand how different political cleavages affect citizens’ redistributive preferences. We use an online experimental survey to manipulate the in-group identity of 500 Canadians. The survey enables respondents to identify with other in-group identities along regional, linguistic, income-group, and urban/rural characteristics. Our results find that while Canadians do have a strong baseline preference for redistributive behaviour, regional and linguistic cleavages moderate this outcome.  相似文献   
223.
Undergraduate public law courses often attract students with competing expectations. Some students enroll in these courses to prepare for law school, while others enroll in the courses to gain a broader understanding of courts in the American system of government. These differing student constituencies can create a dilemma for instructors. A course designed to cater to students with a general interest in the judiciary may not afford prelaw students with an appreciation for the demands of the legal profession. Conversely, a course narrowly tailored toward prelaw students risks alienating the majority of students for whom this class may be their only look at the judiciary. As a means to promote pedagogical balance and to appeal to varied student constituencies, we profile five public law simulations in this article that engage students in active learning and promote a greater understanding of law and courts.  相似文献   
224.
Why the uprisings that broke out across the Middle East and North Africa in 2010-11 ousted the leaders of republics but left monarchies largely intact remains puzzling. One promising explanation for the resilience of monarchical regimes argues that monarchs exercise repression in a comparatively restrained and largely effective fashion. Proponents of this theory tend to conflate two crucial causal factors: the level of state coercion exercised against opposition activists and the degree of indiscriminateness with which coercion is deployed. By treating these variables as analytically distinct, a more compelling explanation for monarchical resilience can be advanced. The advantages of the revised argument are illustrated by revisiting the divergent trajectories of the uprisings in Bahrain, Oman, Saudi Arabia and Kuwait.  相似文献   
225.
226.
227.
自从1979年中国实行改革开放以来,菲中两国的经济关系持续发展。菲律宾对华贸易要比它与世界其他国家的贸易增长得更快。近几年来,我们可以看到,由于菲律宾比素对人民币的比值相对较低,菲律宾对华出口骤增。尽管中国在菲律宾外贸总额中所占的份额已经由80年代的2%增长到现在的4%,但总的来说仍然偏少。 当前的菲中贸易结构以工业制成品为主体。正如其整体贸易结构一样,菲律宾的对华出口贸易以半成品为主。中国的工业制品则包含更多的制成品——电子产品、金属制品和建筑材料。近几年,在中国对菲律宾出口中消费品、食品及食…  相似文献   
228.
The eyes of fourteen fatally abused children and sixteen control cases were examined histopathologically. Ten of the abused children showed intraocular change. The most common ocular changes were subdural hemorrhage of the optic nerve and retinal hemorrhage which involved all the layers of the retina, but most commonly the nerve fiber layer, ganglion cell layer and inner nuclear layer. The presence of blood cavities within the retina partially supported the hypothesis of traumatic retinoschisis. The control cases of non-abused children rarely showed intraocular hemorrhage.  相似文献   
229.
Headspace gas chromatography was used to determine the concentration of ethanol and methanol in blood samples from 519 individuals suspected of drinking and driving in Sweden where the legal alcohol limit is 0.50 mg/g in whole blood (11 mmol/l). The concentration of ethanol in blood ranged from 0.01 to 3.52 mg/g with a mean of 1.83 +/- 0.82 mg/g (+/- S.D.). The frequency distribution was symmetrical about the mean but deviated from normality. A plot of the same data on normal probability paper indicated that it might be composed of two subpopulations (bimodal). The concentration of methanol in the same blood specimens ranged from 1 to 23 mg/l with a mean of 7.3 +/- 3.6 mg/l (+/- S.D.) and this distribution was markedly skew (+). The concentration of ethanol (x) and methanol (y) were positively correlated (r = 0.47, P less than 0.001) and implies that 22% (r2) of the variance in blood-methanol can be attributed to its linear regression on blood-ethanol. The regression equation was y = 3.6 + 2.1 x and the standard error estimate was 0.32 mg/l. This large scatter precludes making reliable estimates of blood-methanol concentration from measurements of blood-ethanol concentration and the regression equation. But higher blood-methanol concentrations are definitely associated with higher blood-ethanol in this sample of Swedish drinking drivers. Frequent exposure to methanol and its toxic products of metabolism, formaldehyde and formic acid, might constitute an additional health risk associated with heavy drinking in predisposed individuals. The determination of methanol in blood of drinking drivers in addition to ethanol could indicate long-standing ethanol intoxication and therefore potential problem drinkers or alcoholics.  相似文献   
230.
A report is given of two young people who died after intake of dextromethorphan, one by suicide and the other for uncertain reasons. To our knowledge this is the first reported fatal intoxications with this drug.  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