全文获取类型
收费全文 | 23247篇 |
免费 | 1343篇 |
专业分类
各国政治 | 987篇 |
工人农民 | 977篇 |
世界政治 | 1532篇 |
外交国际关系 | 795篇 |
法律 | 15756篇 |
中国共产党 | 3篇 |
中国政治 | 121篇 |
政治理论 | 4239篇 |
综合类 | 180篇 |
出版年
2020年 | 472篇 |
2019年 | 510篇 |
2018年 | 663篇 |
2017年 | 687篇 |
2016年 | 770篇 |
2015年 | 594篇 |
2014年 | 627篇 |
2013年 | 2423篇 |
2012年 | 642篇 |
2011年 | 653篇 |
2010年 | 647篇 |
2009年 | 675篇 |
2008年 | 655篇 |
2007年 | 640篇 |
2006年 | 671篇 |
2005年 | 548篇 |
2004年 | 558篇 |
2003年 | 481篇 |
2002年 | 534篇 |
2001年 | 883篇 |
2000年 | 818篇 |
1999年 | 651篇 |
1998年 | 307篇 |
1997年 | 267篇 |
1996年 | 259篇 |
1995年 | 257篇 |
1994年 | 251篇 |
1993年 | 250篇 |
1992年 | 425篇 |
1991年 | 456篇 |
1990年 | 422篇 |
1989年 | 415篇 |
1988年 | 419篇 |
1987年 | 376篇 |
1986年 | 444篇 |
1985年 | 422篇 |
1984年 | 349篇 |
1983年 | 337篇 |
1982年 | 241篇 |
1981年 | 221篇 |
1980年 | 194篇 |
1979年 | 318篇 |
1978年 | 171篇 |
1977年 | 143篇 |
1976年 | 125篇 |
1975年 | 153篇 |
1974年 | 195篇 |
1973年 | 149篇 |
1972年 | 135篇 |
1971年 | 118篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
171.
172.
This paper reviews China's recent efforts to enact a competitionpolicy (antitrust) law. We focus on three issues: (1) What isthe substance of the proposed law, and how does it differ fromexisting antitrust law in other countries, (2) How will thelaw be implemented or enforced, and how will those who mustimplement this law interpret their mandate, and (3) What willbe the likely effects of this law given China's unique historyand cultural heritage. We emphasize China's economic, legaland regulatory contexts in which an antitrust law may be enforced.Our central focus is the problem of establishing a substantiveand procedural legal framework that is incentive-compatiblewith economic efficiency and growth. The draft law could beimproved, both to increase its clarity and to make its enforcementmore consistent with the goal of achieving improvements in economicefficiency. Nevertheless, there is much merit in the draft,especially its strong focus on reducing anticompetitive practicesof state-owned enterprises (SOEs) and other government bodies.However, our major difficulty with the new law is that, in theabsence of a tradition of reliance on the rule of law, Chineseand foreign enterprises will find it very difficult to relyon the antitrust statute or the actions of the courts in Chinaas a basis for predicting the antitrust liability that mightresult from various business practices. Therefore, the principalvector by which antitrust law (or indeed any law) affects economicbehavior is absent from the Chinese scene. Unless the bureaucracythat enforces the new antitrust law actively pursues a policyof consistent enforcement based on written guidelines, staredecisis, or other sources of predictability, the substance ofthe statute itself will have little significance. That outcomewould represent a significant loss for the economic welfareof the Chinese people. 相似文献
173.
174.
M Oris 《The History of the Family》1996,1(2):169-182
This study examines demographic growth and change in Tilleur in the valley of Meuse in Belgium during 1807-80 during the process of industrialization and urbanization. The proportion of immigrants (foreigners and Flemings) increased from 15% in 1807 to 65% in 1856. After 1856, population and industrial growth stabilized. During 1856-66 the proportion of natives stabilized, and the proportion of Flemings increased. It is argued that in Tilleur there were two phases: a foundation phase of industrial and population growth and a phase of maturation with decreased non-native population and greater similarity between groups. Immigrants contributed to the birth rate in greater proportions than their proportion in the population of Tilleur. During 1847-66 native population increased annually from 2.4% to 3.8%. Migrants' annual increases were diminished by the effects of mortality but expanded by the influence of in-migration. During 1857-66 the proportion of foreigners declined and marked the transition to a new phase. During 1830-66 the sex ratio grew from 93 to 119. During the Industrial Revolution in Tilleur, women shifted from outnumbering to undernumbering men. The iron and coal in the region attracted men. The sex ratio among the Flemish was 214 in 1866. In 1830 the proportion of fertile women was higher among immigrants and declined thereafter. Age at marriage rose for natives and declined for immigrants. The native population structure by sex, age, and marriage did not favor the birth rate. During 1866-80 the birth rate of foreign immigrants and rural natives declined, the birth rate of natives doubled, and the gap between these two groups narrowed. The changes among immigrants during the foundation phase led to fertility decline in the maturation phase. Marriage and migration interactions linked the industrial revolution with the demographic transition. 相似文献
175.
176.
177.
178.
M Y I?can 《Journal of forensic sciences》1988,33(6):1473-1476
Dr. Wilton Marion Krogman was one of the major founders of physical and forensic anthropology in the United States. His extraordinary career spanned nearly six decades, and he was universally admired and respected for his scholarship, teaching, research, wit, and humanity. While studies based on human skeletal remains have long been used to assist the medicolegal system, the late Dr. Krogman can be credited with uniting these areas into the discipline of forensic anthropology. His "Guide to the Identification of Human Skeletal Material" (1939) in the F.B.I. Law Enforcement Bulletin became the foundation of this discipline; his monumental book The Human Skeleton in Forensic Medicine (updated with the author in 1986) solidified its establishment. The purpose of this paper is to pay tribute to this great man and outline his influence on the development and advancement of forensic anthropology. 相似文献
179.
Is medical care different? Old questions, new answers 总被引:3,自引:0,他引:3
M V Pauly 《Journal of health politics, policy and law》1988,13(2):227-237
This paper examines whether changes in medical markets may be making them more like other markets. The emergence of HMOs and other managed care systems appears to have increased the consumer's potential ability to make better comparative judgments about the price and quality of medical care, and also seems to have made medical care more like other goods. However, the evidence that medical care is a "reputation good" suggests that it is, in this respect, different from other goods. Finally, the social concerns about medical care use necessarily make medical care different. 相似文献
180.
Significance of functional and nutritive pulmonary circulation for vital reactions in the form of embolisms 总被引:2,自引:0,他引:2
G Adebahr 《Zeitschrift für Rechtsmedizin》1988,100(1):55-64
The functional and nutritive circulation in the lungs is connected by anastomoses between the pulmonary and bronchial arteries. The anastomoses have the structure of blocked arteries from which arteriovenous anastomoses proceed to the peribronchial plexus. The pulmonary artery is provided with a flow impulse by the anastomoses, and oxygen-containing blood is admixed with the venous blood, thus forming an "aortalization" in the lungs. By diverting the bloodstream, venous blood can reach the bronchial artery. The peculiarities of the lung circulation are important for vital reactions in the form of macro- and microembolisms. Macroembolisms prove the functionality of the system if branches of the pulmonary artery are closed before the arteries are blocked. A hemorrhagic infarction either arises or does not arise, and the hemorrhagic infarction cannot exceed a certain limit. A microembolism is over and above the anastomoses. If the microembolism is greater, pressure in the arteria pulmonaris can cause blood from the pulmonary artery to overflow into the bronchial artery. Because arteriovenous anastomoses arise from the blocked arteries, microemboli can now reach the systemic circulation. Thus, the system described can explain the passage of microemboli into the systemic circulation, avoiding the capillaries of the lungs; on the other hand, larger microembolisms can prove the functionality of the system. 相似文献