全文获取类型
收费全文 | 3587篇 |
免费 | 35篇 |
国内免费 | 6篇 |
专业分类
教育 | 2224篇 |
科学研究 | 509篇 |
各国文化 | 20篇 |
体育 | 277篇 |
综合类 | 8篇 |
文化理论 | 43篇 |
信息传播 | 547篇 |
出版年
2022年 | 21篇 |
2021年 | 22篇 |
2020年 | 45篇 |
2019年 | 59篇 |
2018年 | 116篇 |
2017年 | 154篇 |
2016年 | 141篇 |
2015年 | 89篇 |
2014年 | 110篇 |
2013年 | 542篇 |
2012年 | 121篇 |
2011年 | 143篇 |
2010年 | 118篇 |
2009年 | 86篇 |
2008年 | 80篇 |
2007年 | 114篇 |
2006年 | 62篇 |
2005年 | 77篇 |
2004年 | 65篇 |
2003年 | 62篇 |
2002年 | 54篇 |
2001年 | 86篇 |
2000年 | 70篇 |
1999年 | 61篇 |
1998年 | 54篇 |
1997年 | 43篇 |
1996年 | 52篇 |
1995年 | 26篇 |
1994年 | 36篇 |
1993年 | 20篇 |
1992年 | 45篇 |
1991年 | 45篇 |
1990年 | 31篇 |
1989年 | 38篇 |
1988年 | 34篇 |
1987年 | 32篇 |
1986年 | 36篇 |
1985年 | 39篇 |
1984年 | 38篇 |
1983年 | 23篇 |
1982年 | 33篇 |
1981年 | 24篇 |
1980年 | 18篇 |
1979年 | 36篇 |
1978年 | 30篇 |
1977年 | 21篇 |
1974年 | 21篇 |
1972年 | 25篇 |
1971年 | 20篇 |
1966年 | 15篇 |
排序方式: 共有3628条查询结果,搜索用时 15 毫秒
971.
972.
973.
974.
High precision lab work is feasible and all students can be inducted into such practices from day one. This is also required
by the more commercially/industrially oriented laboratories, though no compendium of such practices exists. Based on experience
in imparting such instruction and analysis to teaching labs as well as larger laboratories, some immediately relevant ideas
are put together here. While the ideas may appear simple, there is danger in thinking that the underlying statistical theory
is also simple, which is often not the case. But even without the relevant theory, much can be achieved in the lab. 相似文献
975.
976.
Carnegie MA Bauman A Marshall AL Mohsin M Westley-Wise V Booth ML 《Research quarterly for exercise and sport》2002,73(2):146-155
Data for this study were from a population survey of 1,200 adults ages 40-60 years, sampled from the Illawarra region of New South Wales. Questionnaire items on perceptions of the environment were factor analyzed into: Aesthetic Environment and Practical Environment. For both factors, those in the Contemplation stage had more negative views of the environment than those in Maintenance. Those who walked for 0-20 min/week held more negative perceptions of their environment than those who walked for 21-120 min/week and those who walked for > 120 min/week. The health promotion implications of these findings are that environments perceived as attractive and as providing convenient access to services and facilities may influence motivational readiness for physical activity and time spent walking. 相似文献
977.
V Rajaraman 《Resonance》2000,5(11):26-36
In this part we will depict the infrastructure required for ecommerce as a six layered architecture and describe the three bottom layers. 相似文献
978.
979.
980.
A. S. Sane V. V. Mishra H. L Trivedi 《Indian journal of clinical biochemistry : IJCB》2000,15(1):178-182
Stress-tension-pain occur more often in health disorders of women than anywhere in the entire spectrum of human illness. No where is the effect of rapid change more apparent than in the changing role of today's women who are subjected to pressures from all sides. Now a days women virtually take part occupy positions, in day to day activities similar to their male counterparts. An outline of conceptual consideration, biochemical overview of stress and intricacies of coping mechanisms are delineated from the point of view of stress situations in female (during reproductive life span) peculiar to them only viz menarche, menstrual cycle, pregnancy-eventualities of pregnancy-labour-delivery, purperium, postpartum psychosis, abortions-induced, spontaneous, menopause. Lipid profile and oxidative stress status as biochemical responses in these stresses were investigated. As expected observed maximal/minimal biochemical responses well correlated with peak time and at termination of stress. Present day emphasis is on menstrual regulation by intake of oral contraceptive to improve health if women prefer not to bleed every month and hormone replacement therapy for elderly women to improve post menopausal quality of life and avoiding menstrual problems at the same time. 相似文献