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   4959篇
  免费   150篇
各国政治   173篇
工人农民   225篇
世界政治   327篇
外交国际关系   186篇
法律   3277篇
中国共产党   1篇
中国政治   25篇
政治理论   870篇
综合类   25篇
  2023年   38篇
  2021年   26篇
  2020年   62篇
  2019年   82篇
  2018年   114篇
  2017年   105篇
  2016年   123篇
  2015年   73篇
  2014年   92篇
  2013年   444篇
  2012年   120篇
  2011年   138篇
  2010年   102篇
  2009年   125篇
  2008年   120篇
  2007年   123篇
  2006年   126篇
  2005年   89篇
  2004年   114篇
  2003年   116篇
  2002年   90篇
  2001年   212篇
  2000年   210篇
  1999年   156篇
  1998年   69篇
  1997年   64篇
  1996年   61篇
  1995年   57篇
  1994年   60篇
  1993年   54篇
  1992年   121篇
  1991年   108篇
  1990年   135篇
  1989年   123篇
  1988年   137篇
  1987年   135篇
  1986年   105篇
  1985年   113篇
  1984年   89篇
  1983年   74篇
  1982年   55篇
  1981年   55篇
  1980年   43篇
  1979年   53篇
  1978年   39篇
  1976年   31篇
  1975年   28篇
  1974年   41篇
  1973年   29篇
  1970年   27篇
排序方式: 共有5109条查询结果,搜索用时 15 毫秒
161.
162.
To analyze how Japan's competing objectives and specific policies have been evolving and how they trade off in today's regional security situation, this article argues that shifting Japanese foreign and security policies in Northeast Asia can be understood as ongoing responses to tensions along three key axes. First Japan confronts a tension between bilateralism and multilateralism; second Japan's economic and security interests are often at odds, and third, Japan still struggles with the competing pulls exerted by Asia on the one hand and the West (most particularly the United States) on the other.  相似文献   
163.
164.
This cross-sectional study examined relationships between pubertal development, depressive symptoms and delinquency in a sample of 241 males and 213 females aged 9–13 years. Four objectives were set forth for this study: (1) to examine relationships between pubertal stage or timing and depressive symptoms and delinquency; (2) to compare continuous and categorical measures of pubertal timing; (3) to examine gender as a moderator of these relationships, and (4) to examine maltreatment as a moderator of these relationships. Results indicated that mature pubertal stage and early (continuous) pubertal timing were both related to higher delinquency whereas only early pubertal timing was related to depressive symptoms. Categorical timing was not related to depressive symptoms or delinquency. Neither gender nor maltreatment were found to be moderators. These findings provide evidence against equating pubertal stage, continuous timing, and categorical timing, and highlight the need to identify possible moderators in research on pubertal development.
Penelope K. TrickettEmail:
  相似文献   
165.
In 2005 Indonesian and European institutes joined to start the first step for the implementation of an Ocean Operational System in the Indonesian archipelago. The system will support the decision making process for the sustainable use of marine resources, providing useful information and added value products as well as a service for an improved management of the sea with high business impact to targeted groups as public authorities and commercial operators (coastal managers, fishermen, shipping companies). In this paper the System is shortly described with its potential benefits and economic and social impacts.
A. Ribotti (Corresponding author)Email:
R. Sorgente
A. Hanggono
G. M. R. Manzella
N. Hendiarti
L. Fusco
T. R. Adi
Y. S. Djajadihardja
A. R. Farhan
M. C. G. Frederik
W. F. Ma’ruf
B. Realino
V. Rupolo
P. Ruti
M. Sadly
F. Syamsudin
B. A. Subki
  相似文献   
166.
167.
Negotiation training evaluation tends to be short-term, aspectual and piecemeal; evaluations often focus on only one or two salient outcomes of training. This essay presents a model for negotiation training evaluation research that offers a broad conceptualization of the hypothesized individual and group-level effects of training in collaborative negotiation. The model assesses change at the individual level in conflict-related cognitions, attitudes, affect and behaviors; and at the group level in conflict outcomes and work climate. The Negotiation Evaluation Survey (NES), a time-delayed, multi-source feedback approach to assessment and development, is presented as a means of addressing some of the conceptual and methodological problems inherent in more common methods of training evaluation. An illustrative assessment of one model of collaborative negotiation training for adults, the Coleman/Raider Model, is presented. The results, implications, and future research challenges are discussed.  相似文献   
168.
利用aroA基因建立鸡传染性鼻炎PCR诊断方法   总被引:1,自引:0,他引:1  
利用aroA基因设计了1对引物,分别对10株标准副鸡嗜血杆菌(HPG)菌株、14株分离的HPG菌株进行PCR扩增,结果均得到了与预期大小一致的片段,而对10株非HPG菌株和3株病毒进行扩增则无相应片段产生;该PCR能检测出10个菌细胞.与常规PCR方法相比,aroA-PCR的敏感性更高.  相似文献   
169.
170.
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