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   2080篇
  免费   76篇
  2023年   18篇
  2022年   9篇
  2021年   12篇
  2020年   31篇
  2019年   52篇
  2018年   57篇
  2017年   82篇
  2016年   72篇
  2015年   42篇
  2014年   51篇
  2013年   687篇
  2012年   60篇
  2011年   63篇
  2010年   74篇
  2009年   69篇
  2008年   52篇
  2007年   44篇
  2006年   42篇
  2005年   34篇
  2004年   55篇
  2003年   40篇
  2002年   36篇
  2001年   21篇
  2000年   18篇
  1999年   24篇
  1998年   16篇
  1997年   11篇
  1996年   9篇
  1994年   9篇
  1993年   22篇
  1992年   10篇
  1991年   16篇
  1990年   13篇
  1989年   13篇
  1988年   13篇
  1987年   14篇
  1986年   13篇
  1985年   14篇
  1984年   17篇
  1983年   11篇
  1982年   12篇
  1981年   16篇
  1980年   22篇
  1979年   12篇
  1978年   16篇
  1977年   22篇
  1976年   28篇
  1975年   12篇
  1973年   11篇
  1971年   9篇
排序方式: 共有2156条查询结果,搜索用时 171 毫秒
71.
72.
73.
The most recent addition to the U.S. Constitution is also one of the first proposed amendments. The 27th Amendment restricts change to congressional salaries until after the next election. First drafted by James Madison and approved by Congress in 1789, the proposal was among a package of 12 items sent to the states. Ten of those proposed amendments were ratified and became known as the Bill of Rights. The others languished with only occasional attention by constitutional scholars. In the early 1980s, an undergraduate student at the University of Texas wrote a term paper arguing for adoption of the limits on congressional pay raises. After receiving a C grade from his teaching assistant and instructor, the student rejected the opinions of his teachers and independently pursued the adoption of Madison's proposal. Gregory Watson single-handedly mounted a letter-writing and lobbying campaign that caused state legislators to redirect their attention to the proposed amendment. In 1992, following a most unusual ratification process—including certification by the Archivist of the United States—the measure became the 27th Amendment. In this article, we trace the history of the amendment, demonstrate that its impact has been more symbolic than substantive, and argue that Congress needs to reassert its authority over the amendment process in line with the letter and spirit of Article V. The 27th Amendment has a peculiar constitutional history, and there are lessons we should learn from that experience.  相似文献   
74.
75.
76.
ABSTRACT

This paper examines the memorialisation of the Sherwood Foresters who fought during the Easter Rising of 1916 in Dublin. These men, from Nottinghamshire and Derbyshire in the English midlands, suffered the greatest casualties of the British regiments involved in the insurrection, and participated in the firing squads that executed the rebel leaders. Yet the public and artistic memorialising of these English soldiers is not widely known, and this interdisciplinary paper seeks to tell the unfamiliar story of what happened to the Sherwood Foresters after the fighting of Easter Week ceased. We use archival material in order to explore how, at the time of the Rising, these men believed that they would be remembered. We examine the way that the Sherwood Foresters of Easter Week subsequently appeared in literature and drama. And we analyse the way that those soldiers have been commemorated in funerary memorials.  相似文献   
77.
广西桂平博物馆藏东汉铜甑对于研究广西地区青铜器冶铸技术的发展具有重要的研究价值。但器物长期保存于潮湿环境中,矿化严重、保存状况较差,亟须保护修复。本研究应用X射线影像观察、金相显微镜、扫描电镜及能谱分析、模拟实验验证等方法研究了器物的铸造工艺、合金成分以及锈蚀产物成分。结果表明该器物为整体铸造成形,器物铸造时使用了轮制技术、刮板造型工艺以及铸后刻纹的工艺,箅部范块制作过程是用器身模翻制器身范后脱模,将器身模的圈足部分切下,然后在圈足泥模上刻出箅部型腔。在此基础上,遵循最低限度干预原则,力求将传统的文物修复手段与现代修复理念相结合,通过除锈、修补等保护修复措施后,不但提高了器物的整体稳定性,而且达到了可以展陈,发掘文物潜在价值的要求。  相似文献   
78.
79.
80.
Telepresence-enabled exploration of deep sea environments has developed over the past 30 years, providing access to archaeologists, scientists, and the general public to sites otherwise inaccessible due to depth. Pioneered through the inception of the JASON Project in the late 1980 s, telepresence missions have expanded to two dedicated ships of exploration, NOAA Ship Okeanos Explorer and exploration vessel Nautilus, and has been implemented on a series of opportunistic missions on other vessels. This paper chronicles the history of the use of telepresence for the exploration of shipwrecks in deep water as well as how this capability has allowed the public to engage with such missions. Broadening the scope of who can explore the deep sea, telepresence has also expanded what is observed and documented in the deep, which speaks to humanity’s use of the maritime world and an archaeology of discard through our material disposed of into the deep sea.  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