全文获取类型
收费全文 | 18175篇 |
免费 | 324篇 |
专业分类
各国政治 | 661篇 |
工人农民 | 1316篇 |
世界政治 | 912篇 |
外交国际关系 | 622篇 |
法律 | 10974篇 |
中国政治 | 72篇 |
政治理论 | 3865篇 |
综合类 | 77篇 |
出版年
2020年 | 120篇 |
2019年 | 152篇 |
2018年 | 1433篇 |
2017年 | 1372篇 |
2016年 | 1206篇 |
2015年 | 219篇 |
2014年 | 196篇 |
2013年 | 1001篇 |
2012年 | 400篇 |
2011年 | 1146篇 |
2010年 | 1194篇 |
2009年 | 784篇 |
2008年 | 959篇 |
2007年 | 896篇 |
2006年 | 275篇 |
2005年 | 295篇 |
2004年 | 403篇 |
2003年 | 386篇 |
2002年 | 256篇 |
2001年 | 392篇 |
2000年 | 296篇 |
1999年 | 258篇 |
1998年 | 144篇 |
1997年 | 146篇 |
1996年 | 120篇 |
1995年 | 149篇 |
1994年 | 139篇 |
1993年 | 134篇 |
1992年 | 193篇 |
1991年 | 229篇 |
1990年 | 205篇 |
1989年 | 202篇 |
1988年 | 210篇 |
1987年 | 229篇 |
1986年 | 235篇 |
1985年 | 252篇 |
1984年 | 222篇 |
1983年 | 221篇 |
1982年 | 143篇 |
1981年 | 128篇 |
1980年 | 107篇 |
1979年 | 128篇 |
1978年 | 111篇 |
1977年 | 91篇 |
1976年 | 81篇 |
1975年 | 92篇 |
1974年 | 113篇 |
1973年 | 91篇 |
1972年 | 82篇 |
1969年 | 74篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
To elucidate the post-mortem proteolysis we investigated the behaviour of the free amino acids in rotting liver homogenates by means of two-dimensional thin-layer chromatography and reflection densitometry. The post-mortem alterations of the amino acid levels are characterized mostly by a two-phase increase with maxima at the end of the first and after the third week. A few amino acids showed only little changes hardly above the physiological intra-cellular levels. Anaerobic rat experiments and experiences with antibiotic treatment give rise to the supposition that increasing amino acid concentrations indicate a predominance of proteolytic activities over aminoacid catabolism. In the beginning autoenzymes are prevalent, while afterwards bacterial proteases probably predominate. The transient regression about the second and thrid week is interpreted as the effect of a temporarily intensified amino acid degradation by foreign enzymes (maximal bacterial growth). 相似文献
992.
993.
994.
995.
Kenneth W. Wiltshire 《Australian Journal of Public Administration》1974,33(3):253-273
"We are therefore giving priority to setting up economic planning machinery with industry and employee co-operation to restore strong but balanced economic growth."—E. G. Whitlam, The Australian , 14th May, 1973. 相似文献
996.
Alan W. Black 《Australian Journal of Public Administration》1974,33(4):332-345
The outcomes of various modes of administration may be summarized as follows:
- 1 Under both ministerial and departmental control, the prior experience and predispositions of the Minister were critical factors affecting the colleges. Under departmental control, the background and attitudes of senior officers within the department were also important. Various instances of this were cited.
- 2 There tended to be proportionately fewer dismissals of principals or resignations in protest by them under departmental control than when colleges were controlled by Ministers of the Crown or governing councils. Several reasons for this trend were suggested.
- 3 Under all systems of control the colleges were subject from time to time to direct or indirect political pressure. For example, there were instances in which parents invoked or attempted to invoke political pressure to save their sons from expulsion from a college. Such pressures played a part in the dismissal or resignation of several principals.
- 4 Another factor which led to the resignation of two principals who were directly responsible to a Minister was the belief that their jurisdiction had been transgressed by another senior public servant.
- 5 Under departmental control a principal was likely to be caught up in intradepartmental politics. The fortunes of the college depended somewhat upon his success in this arena.
- 6 In determining the policies and practices to be adopted on the college farm, a principal generally had greater freedom under Education Department control than under Agriculture Department control. On the other hand, teaching practices were generally subject to closer departmental supervision in the former case than in the latter.
- 7 One problem with any system of control is that of maintaining a balance between continuity in policy on the one hand and sensitivity to demands for change on the other. In general, control over the colleges by government departments or governing councils tended to be conservative in emphasis, to stress continuity. By contrast, where control was directly exercised by Ministers of the Crown and where there were relatively frequent changes in incumbency of the relevant portfolio, continuity in policy was less assured.
- 8 The life of advisory committees was typically marked by early enthusiasms and influence in dealing with urgent matters of policy. After these matters had been dealt with there was generally a decline in activity and influence, growing disillusion among members, and eventually reconstitution or replacement of the committee.
997.
998.
999.
1000.