全文获取类型
收费全文 | 76080篇 |
免费 | 3333篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 4608篇 |
工人农民 | 3037篇 |
世界政治 | 6561篇 |
外交国际关系 | 3946篇 |
法律 | 37948篇 |
中国共产党 | 15篇 |
中国政治 | 798篇 |
政治理论 | 21540篇 |
综合类 | 965篇 |
出版年
2021年 | 422篇 |
2020年 | 1188篇 |
2019年 | 1553篇 |
2018年 | 1784篇 |
2017年 | 2092篇 |
2016年 | 2277篇 |
2015年 | 1862篇 |
2014年 | 2135篇 |
2013年 | 10797篇 |
2012年 | 1829篇 |
2011年 | 1989篇 |
2010年 | 1967篇 |
2009年 | 2178篇 |
2008年 | 2010篇 |
2007年 | 2045篇 |
2006年 | 2148篇 |
2005年 | 2055篇 |
2004年 | 1926篇 |
2003年 | 1762篇 |
2002年 | 1786篇 |
2001年 | 2057篇 |
2000年 | 1729篇 |
1999年 | 1535篇 |
1998年 | 1246篇 |
1997年 | 1056篇 |
1996年 | 1014篇 |
1995年 | 980篇 |
1994年 | 999篇 |
1993年 | 1011篇 |
1992年 | 1176篇 |
1991年 | 1226篇 |
1990年 | 1153篇 |
1989年 | 1151篇 |
1988年 | 1150篇 |
1987年 | 1133篇 |
1986年 | 1157篇 |
1985年 | 1185篇 |
1984年 | 1069篇 |
1983年 | 1099篇 |
1982年 | 948篇 |
1981年 | 905篇 |
1980年 | 707篇 |
1979年 | 793篇 |
1978年 | 653篇 |
1977年 | 583篇 |
1976年 | 526篇 |
1975年 | 484篇 |
1974年 | 494篇 |
1973年 | 478篇 |
1972年 | 413篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
411.
412.
413.
414.
415.
Ministerial reshuffles are complex exercises requiring careful handling. A frequent occurrence in British government, their significance is usually seen in political terms. Prime Ministers attach great importance to maximizing the political advantages to be gained from them. This factor is the chief determinant of their logistics, the principal characteristics of which are secrecy in advance and the speed with which ministerial changes are executed. These features - as much as the frequency of ministerial changes per se - may disrupt the policy process and have serious implications for minister-civil servant power relations. Such problems could be alleviated by giving ministers advance notice of changes of post. The institution of a process of ministerial handovers would strengthen the position of incoming ministers by making them less dependent on their officials, upon whom they rely heavily for initial briefing at present. 相似文献
416.
Misidentification syndromes have been studied from a variety of perspectives, including phenomenological, biological, and nosological approaches. More recently, misidentification syndromes have been studied from a psychiatric-legal perspective, especially with regards to the problem of dangerousness. Capgras syndrome and other syndromes of misidentification can lead to hostile mood and subsequent physical violence. Little attention has so far been devoted to children as the objects of the psychotic person's misidentification delusion(s). We provide a review of cases from the anglophonic literature that have children as the misidentified objects, add three new cases, and then discuss the relationship between misidentification and potential harm to these children. 相似文献
417.
In many countries it is left to the discretion of the court to accept or reject conclusions based on sampling procedures as applied to the total drug exhibit. As an alternative to this subjective approach, a statistical basis is presented using binomial and hypergeometric distributions to determine a lower limit for the proportion of units in a population which contains a drug, at a given confidence level. A method for calculating the total weight of a drug present in a population within a given confidence interval is also presented. In the event of no failures (all units sampled contain a drug), a sample size of six or seven units is generally sufficient to state that a proportion of at least 0.70 of the population contains a drug at a confidence level of at least 90%. When failures do occur in the sample, point estimation is used as the basis for selecting the appropriate sample size. 相似文献
418.
A gas chromatographic (GC) fingerprint method, based on the presence or absence of six congeners, was developed for illicit cocaine samples. The fingerprint utilizes the relative abundances of these congeners towards each other, disregarding cocaine as the main constituent, and can be expressed numerically or graphically in the form of pictograms for rapid visual comparison. The method can be applied directly to a solution of the sample in chloroform, without previous workup procedures. More than 70 unrelated samples were analyzed and a great variation was observed in the parameter composition. On the other hand, a remarkable similarity could be seen between related samples. The GC fingerprint method may be considered an important contribution for sample comparison, as is exemplified by a subdivision of the analyzed samples in different categories, based on the number and types of congeners found. 相似文献
419.
Marsha B. Liss 《Law and human behavior》1992,16(4):463-471
During the past decade the field of psychology of law has changed considerably. Accompanying the growth of research and practice, there has been an increase in offerings of courses in this field. The courses are offered at both undergraduate and graduate levels and cover a wide spectrum of interests. The types of courses currently being offered and the student samples enrolling in the courses are examined. In addition, a review of the major textbooks used in the courses is provided. 相似文献
420.
We report a case of rapid death from thrombotic thrombocytopaenic purpura (TTP) in a young pregnant lady who developed full blown symptoms soon after caesarean section. Extensive intramyocardial confluent haemorrhages and widespread microthrombi in heart, brain, adrenals and kidney were found at autopsy. Thrombotic thrombocytopaenic purpura is an uncommon condition, which carries a high fatality rate if untreated. Awareness of this syndrome together with its high risk of sudden death underlines the importance of rapid diagnosis and treatment. 相似文献