全文获取类型
收费全文 | 17151篇 |
免费 | 40篇 |
国内免费 | 77篇 |
专业分类
系统科学 | 58篇 |
丛书文集 | 174篇 |
教育与普及 | 68篇 |
理论与方法论 | 49篇 |
现状及发展 | 7702篇 |
研究方法 | 688篇 |
综合类 | 8359篇 |
自然研究 | 170篇 |
出版年
2012年 | 217篇 |
2011年 | 369篇 |
2009年 | 101篇 |
2008年 | 268篇 |
2007年 | 300篇 |
2006年 | 286篇 |
2005年 | 290篇 |
2004年 | 333篇 |
2003年 | 294篇 |
2002年 | 284篇 |
2001年 | 475篇 |
2000年 | 500篇 |
1999年 | 342篇 |
1994年 | 305篇 |
1992年 | 277篇 |
1991年 | 225篇 |
1990年 | 285篇 |
1989年 | 254篇 |
1988年 | 260篇 |
1987年 | 288篇 |
1986年 | 292篇 |
1985年 | 340篇 |
1984年 | 236篇 |
1983年 | 259篇 |
1982年 | 216篇 |
1981年 | 208篇 |
1980年 | 248篇 |
1979年 | 517篇 |
1978年 | 437篇 |
1977年 | 391篇 |
1976年 | 319篇 |
1975年 | 388篇 |
1974年 | 477篇 |
1973年 | 428篇 |
1972年 | 431篇 |
1971年 | 566篇 |
1970年 | 616篇 |
1969年 | 533篇 |
1968年 | 536篇 |
1967年 | 464篇 |
1966年 | 409篇 |
1965年 | 298篇 |
1964年 | 128篇 |
1959年 | 166篇 |
1958年 | 322篇 |
1957年 | 253篇 |
1956年 | 202篇 |
1955年 | 200篇 |
1954年 | 193篇 |
1948年 | 167篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
Brian Young 《Studies in history and philosophy of science》2004,35(3):645-663
The career of John Jackson (1686-1763), Arian theologian and controversialist, provides a key to unlocking the early reception and quick collapse of a Newtonian natural apologetic originally developed by Samuel Clarke. The importance of friendship and discipleship in eighteenth-century intellectual enquiry is emphasised, and the links between Newton and his followers are traced alongside those of a group of Cambridge Lockeans, led by Jackson’s direct contemporary Daniel Waterland, who proved instrumental in the initial dismantling of Clarke’s brand of Newtonian apologetic. The controversial context of this engagement is shown to have been largely provided by the religiously compromising rise of freethinking, and Tindal’s Christianity as old as the creation (1731) signalled the dangers to proponents of natural religion as an adjunct of Christian apologetic in such a heated atmosphere. Religious division of the sort that resulted paradoxically played into the hands of the freethinkers in the anticlerical atmosphere of the 1730s, and accusations were exchanged between Newtonians and Lockeans accordingly. The dynamic of England’s Enlightenment experience is, then, a complicated one, and, as the career and writings of Jackson and William Whiston demonstrate, it was one which absorbed as well as repudiated ‘enthusiasm’. 相似文献
2.
3.
Mark H. Bickhard 《Foundations of Science》2003,8(3):283-293
If the general arguments concerning theinvolvement of variation and selection inexplanations of ``fit'' are valid, then variationand selection explanations should beappropriate, or at least potentiallyappropriate, outside the paradigm historisticdomains of biology and knowledge. In thisdiscussion, I wish to indicate some potentialroles for variation and selection infoundational physics – specifically inquantum field theory. I will not be attemptingany full coherent ontology for quantum fieldtheory – none currently exists, and none islikely for at least the short term future. Instead, I wish to engage in some partiallyspeculative interpretations of some interestingresults in this area with the aim ofdemonstrating that variation and selectionnotions might play a role even here. Ifvariation and selection can survive in even asinhospitable and non-paradigmatic a terrain asfoundational physics, then it can surviveanywhere. 相似文献
4.
Ten-day treatment with nicotine (5, 25 or 50 micrograms/ml drinking water) dose-dependently intensified gastric ulceration induced by cold-restraint, and emptying rate. Stomach contractions produced by graded doses of bethanechol i.v. were elevated further by nicotine treatment. It is suggested that chronic nicotine administration produces hypersensitivity of the gastric muscarinic receptors; stomach hypermotility contributes to the ulcer-worsening action of the alkaloid. 相似文献
5.
6.
7.
8.
9.
10.