全文获取类型
收费全文 | 9656篇 |
免费 | 112篇 |
专业分类
各国政治 | 626篇 |
工人农民 | 381篇 |
世界政治 | 738篇 |
外交国际关系 | 462篇 |
法律 | 5377篇 |
中国共产党 | 2篇 |
中国政治 | 151篇 |
政治理论 | 1943篇 |
综合类 | 88篇 |
出版年
2020年 | 132篇 |
2019年 | 146篇 |
2018年 | 206篇 |
2017年 | 228篇 |
2016年 | 234篇 |
2015年 | 209篇 |
2014年 | 212篇 |
2013年 | 1141篇 |
2012年 | 258篇 |
2011年 | 328篇 |
2010年 | 235篇 |
2009年 | 250篇 |
2008年 | 263篇 |
2007年 | 238篇 |
2006年 | 233篇 |
2005年 | 211篇 |
2004年 | 231篇 |
2003年 | 247篇 |
2002年 | 177篇 |
2001年 | 363篇 |
2000年 | 339篇 |
1999年 | 300篇 |
1998年 | 150篇 |
1997年 | 109篇 |
1996年 | 122篇 |
1995年 | 104篇 |
1994年 | 114篇 |
1993年 | 107篇 |
1992年 | 162篇 |
1991年 | 162篇 |
1990年 | 152篇 |
1989年 | 141篇 |
1988年 | 160篇 |
1987年 | 157篇 |
1986年 | 162篇 |
1985年 | 152篇 |
1984年 | 151篇 |
1983年 | 157篇 |
1982年 | 94篇 |
1981年 | 69篇 |
1980年 | 83篇 |
1979年 | 101篇 |
1978年 | 80篇 |
1977年 | 67篇 |
1976年 | 71篇 |
1975年 | 60篇 |
1974年 | 53篇 |
1972年 | 56篇 |
1971年 | 54篇 |
1969年 | 54篇 |
排序方式: 共有9768条查询结果,搜索用时 15 毫秒
961.
962.
963.
A portable case has been developed by which cyanoacrylate (super glue) fuming can be used inside a vehicle suspected of being involved in serious crime. The car itself serves as a fumigation chamber and the cyanoacrylate vapours are fed into the car via a hose. Connected to the hose and suspended inside the car is a vapour diffuser. The cyanoacrylate originates from a portable case where there is a sealed heater and also a command panel with hygrometer and thermometer for a technician to control the process. There is also space inside the case for other necessary equipment. 相似文献
964.
965.
ABSTRACT Online media have had a great impact on communications and given birth to new paradigms of marketing and marketing communication. Most significant amongst these is the paradigm of integration. Web-based communication permits comprehensive integration and it has raised integration to the status of a business imperative. If integration is indeed so central to the success of the corporate endeavour it becomes increasingly important to evaluate its application and quality. This article explores the assessment of Web-based marketing communication integration. Integrated Web-based marketing communication (IWMC) is conceptualised and the theoretical assumptions of integration are related to Web-based communication. The methodology of the investigation, the analysis of the data and the results of the tracking study are presented and discussed. 相似文献
966.
967.
968.
Saturnino M. Borras Jr. Jennifer C. Franco Sergio Gómez Cristóbal Kay Max Spoor 《The Journal of peasant studies》2013,40(3-4):845-872
Land grabbing has gained momentum in Latin America and the Caribbean during the past decade. The phenomenon has taken different forms and character as compared to processes that occur in other regions of the world, especially Africa. It puts into question some of the assumptions in the emerging literature on land grabbing, suggesting these are too food-centered/too food crisis-centered, too land-centred, too centred on new global food regime players – China, South Korea, Gulf States and India – and too centred on Africa. There are four key mechanisms through which land grabbing in Latin American and the Caribbean has been carried out: food security initiatives, energy/fuel security ventures, other climate change mitigation strategies, and recent demands for resources from newer hubs of global capital. The hallmark of land grabbing in the region is its intra-regional character: the key investors are (Trans-)Latin American companies, often in alliance with international capital and the central state. Initial evidence suggests that recent land investments have consolidated the earlier trend away from (re)distributive land policies in most countries in the region, and are likely to result in widespread reconcentration of land and capital. 相似文献
969.
970.
Murat C. Mungan 《Public Choice》2017,172(3-4):397-397