全文获取类型
收费全文 | 2027篇 |
免费 | 239篇 |
国内免费 | 399篇 |
出版年
2024年 | 2篇 |
2023年 | 33篇 |
2022年 | 47篇 |
2021年 | 87篇 |
2020年 | 102篇 |
2019年 | 73篇 |
2018年 | 89篇 |
2017年 | 92篇 |
2016年 | 93篇 |
2015年 | 64篇 |
2014年 | 71篇 |
2013年 | 152篇 |
2012年 | 110篇 |
2011年 | 164篇 |
2010年 | 132篇 |
2009年 | 153篇 |
2008年 | 177篇 |
2007年 | 202篇 |
2006年 | 199篇 |
2005年 | 164篇 |
2004年 | 88篇 |
2003年 | 69篇 |
2002年 | 40篇 |
2001年 | 24篇 |
2000年 | 31篇 |
1999年 | 29篇 |
1998年 | 25篇 |
1997年 | 18篇 |
1996年 | 22篇 |
1995年 | 12篇 |
1994年 | 8篇 |
1993年 | 14篇 |
1992年 | 10篇 |
1991年 | 4篇 |
1990年 | 6篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1982年 | 9篇 |
1981年 | 6篇 |
1980年 | 4篇 |
1979年 | 3篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1971年 | 2篇 |
1968年 | 2篇 |
1966年 | 3篇 |
排序方式: 共有2665条查询结果,搜索用时 0 毫秒
91.
92.
In 3 experiments, the authors examined movement space-time variability as a function of the force-time properties of the initial impulse in a movement timing task. In the range of motion and movement time task conditions, peak force, initial rate of force, and force duration were manipulated either independently or in combination across a range of parameter values. The findings showed that (a) impulse variability is predicted well by the elaboration of the isometric force variability scaling functions of L. G. Carlton, K. H. Kim, Y. T. Liu, and K. M. Newell (1993) to movement, and (b) the movement spatial and temporal outcome variability are complementary and well predicted by an equation treating the variance of force and time in Newton's 2nd law as independent random variables. Collectively, the findings suggest that movement outcome variability is the product of a coherent space-time function that is driven by the nonlinear scaling of the force-time properties of the initial impulse. 相似文献
93.
94.
95.
96.
97.
伪医学国际化之成因 总被引:1,自引:0,他引:1
刘俊荣 《医学与哲学(人文社会医学版)》1999,20(9):6-7
伪医学的表现形式多种多样,且存在于世界的各个角落,功利思想的驱动、职业道德的沦丧,使传播者见利忘义;医学水平的局限、本能的求生意识诱发了人们求助伪医学的侥幸心理;医巫同源的影响、伪医学的心理调控作用模糊了人们对其本质的认识;贫困者对现代医疗费用的畏惧、富有者对健康长寿的奢望为伪医学提供了广阔的市场;文化差异的存在,使伪医学拥有了生长的土壤 相似文献
98.
现代解剖学的涵义已大大延伸了,许多边缘学科,其地位仍然是重要的。无论从微观上或宏观看,前景是非常广阔的。活体水平上的研究应是人体解剖学发展的基本方向,要用辩证的思维方法作指导。 相似文献
99.
Relations between social comparison orientation and adjustment in Chinese adolescents: Moderating effects of initial adjustment status 下载免费PDF全文
This 1‐year longitudinal study examined relations between social comparison orientation (SCO) and socioemotional adjustment and academic achievement. A sample of Grades 7 and 8 students (N = 336, initial M age = 14.08 years) in China participated in the study. Data were collected from self‐reports, peer assessments and school records. It was found that early SCO positively contributed to later academic achievement. Moreover, the relations between early SCO and later socioemotional adjustment were moderated by the initial status of adolescents. Specifically, SCO was positively associated with social competence and negatively associated with depression in initially competent and well‐adjusted adolescents, but the pattern of the associations was opposite in initially incompetent and poorly adjusted adolescents. The results indicate that whereas SCO may contribute directly to academic achievement, its contributions to socioemotional development might depend on adolescents' initial status in adjustment. 相似文献
100.