全文获取类型
收费全文 | 1052篇 |
免费 | 48篇 |
专业分类
各国政治 | 42篇 |
工人农民 | 99篇 |
世界政治 | 92篇 |
外交国际关系 | 79篇 |
法律 | 497篇 |
中国共产党 | 1篇 |
中国政治 | 10篇 |
政治理论 | 273篇 |
综合类 | 7篇 |
出版年
2023年 | 14篇 |
2022年 | 13篇 |
2021年 | 14篇 |
2020年 | 40篇 |
2019年 | 49篇 |
2018年 | 57篇 |
2017年 | 58篇 |
2016年 | 48篇 |
2015年 | 32篇 |
2014年 | 42篇 |
2013年 | 147篇 |
2012年 | 35篇 |
2011年 | 42篇 |
2010年 | 31篇 |
2009年 | 26篇 |
2008年 | 36篇 |
2007年 | 47篇 |
2006年 | 46篇 |
2005年 | 30篇 |
2004年 | 38篇 |
2003年 | 29篇 |
2002年 | 31篇 |
2001年 | 22篇 |
2000年 | 17篇 |
1999年 | 16篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 7篇 |
1995年 | 8篇 |
1994年 | 10篇 |
1993年 | 11篇 |
1992年 | 8篇 |
1991年 | 10篇 |
1990年 | 4篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 2篇 |
1982年 | 5篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1976年 | 5篇 |
1975年 | 1篇 |
1972年 | 1篇 |
1971年 | 4篇 |
1970年 | 1篇 |
1966年 | 3篇 |
1963年 | 1篇 |
排序方式: 共有1100条查询结果,搜索用时 281 毫秒
261.
In reply to Marquette and Peiffer's article “Grappling With the ‘Real Politics’ of Systemic Corruption: Theoretical Debates Versus ‘Real‐World’ Functions,” this article employs three criticisms: Marquette and Peiffer's call to grapple with the “real politics of corruption” does not bring much new to the table, is conceptually flawed, and risks serving as an excuse for corrupt elites to pursue “business as usual.” In response, we reaffirm three insights gained from collective action‐based approaches toward corruption. Although corruption might solve individual‐level problems in the short term, it is still a de facto problem at the aggregate level, the tools derived from principal–agent theory will not solve the collective action problem of systemic corruption, and elites will be the least likely to implement reform. We conclude by calling for the continued fight against corruption—a fight informed by empirical and theoretical knowledge. 相似文献
262.
263.
Aprile A Ranzato C Rizzotto MR Arseni A Da Dalt L Facchin P 《Forensic science international》2011,210(1-3):e16-e20
The entities responsible for isolated vaginal bleeding are a broad spectrum of diseases. Vaginal bleeding in a prepubertal child is always treated as an alarming symptom both by parents and professionals. Most often, one of the first hypotheses is that a sexual abuse may be occurred and the clinical work up is oriented to explore it and eventually confirm or substantiante another diagnosis. Among the possible differential diagnosis urethral prolapse has to be considered. We report the case of a 6 years-old Caucasian girl referred to our Service for a mild vaginal bleeding and with the suspicion of sexual abuse, excluded after the confirmation of the presence of urethral prolapse. The clinical picture and workup are described and compared with a review of the international literature on the issue. 相似文献
264.
Blencowe T Pehrsson A Lillsunde P Vimpari K Houwing S Smink B Mathijssen R Van der Linden T Legrand SA Pil K Verstraete A 《Forensic science international》2011,212(1-3):173-179
A decaying cadaver emits volatile organic compounds that are used by necrophilous and necrophagous insects in order to find their brood substrate. Although volatile organic compounds (VOCs) that are released by carcasses have been identified, little is known about the specific compounds that are used by these insects while searching for a brood substrate. Therefore, we have investigated the chemical ecology involved in the attraction of the necrophagous hide beetle Dermestes maculatus, which feeds as an adult and larva upon decomposing carcasses. Our aims have been to identify the responsible compounds in the odours of the carcass that are important for the attraction of the beetles. Furthermore, we have studied sex- and age-related differences in beetle attraction and tested whether the hide beetle can distinguish between various stages of decomposition by means of the emitted odours. Headspace collection of volatiles released from piglet carcasses (bloated stage, post-bloating stage, advanced decay and dry remains), coupled gas chromatography-mass spectrometry (GC-MS), gas chromatography with electroantennographic detection (GC-EAD) and bioassays were conducted to identify the volatiles responsible for the attraction of the beetles. Freshly emerged male beetles were attracted by the odour of piglets in the post-bloating stage (9 days after death; T(mean) = 27 °C) and the EAD-active compound benzyl butyrate. Statistical analysis revealed a higher relative proportion of benzyl butyrate in the odour bouquet of the post-bloating stage in comparison with the other stages. We therefore conclude that this compound plays an important role in the attraction of hide beetles to carcass odour. This underlines the potential use of D. maculatus for the estimation of the post mortem interval. The decomposition stage at which the female beetles are attracted to the odour of a cadaver remains unknown, as does the nature of this attraction. Pheromones (sexual or aggregation pheromones) might play an essential role correlated with their attraction to carrion and consequently with their attraction to the substrate for mating and ovipositioning. 相似文献
265.
Almost all U.S. hospitals procure their equipment through group purchasing organizations ("GPOs"). Some hospitals subject the prices secured by GPOs to a second round of competition in an "aftermarket," in which vendors both on and off the GPO contract compete for the hospital's business. To measure the extent of the potential benefit to hospitals from another round of competition, we analyzed a database of approximately 8,100 aftermarket transactions for hospital capital equipment. The transactions data suggest that hospitals were able to achieve average savings of approximately 10 to 14 percent across the entire database (2001 through 2010) and a savings of 15 percent on average for 2010 data. These savings may be attributable to many factors, including the compensation structure of GPOs. 相似文献
266.
- Water supports life, society, the environment and the economy, therefore, the task of ensuring a nation's water supply is one of the most fundamental responsibilities of every government. Water management has become a greater challenge due to the increased demand for water as a result of population growth and the impact of climate change on the variability of rainfall. In response, many cities have implemented plans to augment their traditional water supplies (e.g. dams and groundwater) with new or alternative sources (e.g. recycled wastewater and desalinated sea water). Historical evidence suggests that in order for water augmentation projects to be successfully implemented, the support of the general public is required. It is thus critical to understand the factors which influence people's attitudes regarding water‐related matters. The aim of this study is to identify these influencing factors. Results from an empirical study including both qualitative and quantitative components indicate that a number of factors are influential in the public's acceptance of alternative water sources, including research findings, the experience of water shortage, consideration for future generations and news, facts and other publicized information. Notably, politicians and the government were rated by respondents as having a low level of influence. Factors which may determine differences in influence were explored. This revealed a small number of differences for people with low acceptance levels of recycled and desalinated water, and for people with higher levels of education. Systematic differences were identified by comparing the general Australian population with that of Toowoomba, a regional town in Queensland where a referendum on a water recycling project was held. Policy implications are discussed.
267.
268.
269.
Lavadera AL Ferracuti S Togliatti MM 《International journal of law and psychiatry》2012,35(4):334-342
The present study highlights the characteristics of separated families in Italy for whom Parental Alienation Syndrome (PAS) has been diagnosed during court custody evaluations. The study analyzed the psychological reports of 12 court-appointed expert evaluations of families for whom PAS had been diagnosed. Twelve evaluations that did not receive the PAS diagnosis served as a control group. A specific coding system was used for data analysis. The results indicated that the alienating parents were always the parents who had custody of the children. Children who were diagnosed with PAS were predominantly the only child in the family, had identity problems and manifested manipulative behavior. The consultant in these cases suggested individual psychotherapy for the children and recommended foster care to the Social Services agency. 相似文献
270.
We argue that personal belief exemptions to the mandate for childhood immunizations should not be allowed. Parents who choose not to immunize their children put both their own children and other children at risk. Other children are at risk because unimmunized children go to school or day care when they are contagious but asymptomatic, exposing many more children to potentially dangerous infections. The risks to children from disease are much higher than the risks of vaccines. There are, of course, some bona fide reasons why children should not be immunized. Some children have known allergies or other medical contraindications to certain immunizations. Immunization refusals based on parental beliefs, however, do not fall into this category. In those cases, children are denied the protection of immunizations without any medical or scientific justification. By eliminating personal belief exemptions to those childhood vaccines associated with contagious diseases that have high rates of childhood mortality, we would better protect children and would more fairly spread the burdens of this important public health program. 相似文献