首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   14517篇
  免费   173篇
  国内免费   12篇
教育   9851篇
科学研究   1310篇
各国文化   152篇
体育   1508篇
综合类   22篇
文化理论   104篇
信息传播   1755篇
  2021年   109篇
  2020年   209篇
  2019年   299篇
  2018年   342篇
  2017年   414篇
  2016年   364篇
  2015年   238篇
  2014年   319篇
  2013年   2601篇
  2012年   277篇
  2011年   319篇
  2010年   249篇
  2009年   280篇
  2008年   267篇
  2007年   259篇
  2006年   243篇
  2005年   225篇
  2004年   466篇
  2003年   357篇
  2002年   383篇
  2001年   246篇
  2000年   258篇
  1999年   203篇
  1998年   99篇
  1997年   123篇
  1996年   151篇
  1995年   138篇
  1994年   129篇
  1993年   125篇
  1992年   179篇
  1991年   180篇
  1990年   163篇
  1989年   215篇
  1988年   176篇
  1987年   207篇
  1986年   178篇
  1985年   232篇
  1984年   191篇
  1983年   173篇
  1982年   152篇
  1981年   129篇
  1980年   110篇
  1979年   173篇
  1978年   136篇
  1977年   121篇
  1976年   139篇
  1975年   103篇
  1974年   118篇
  1973年   96篇
  1971年   107篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
211.
Cerdán  R.  Pérez  A.  Vidal-Abarca  E.  Rouet  J. F. 《Reading and writing》2019,32(8):2111-2124
Reading and Writing - The present study investigates the effectiveness of question paraphrases in supporting students’ understanding of a specific task. Secondary school students (i.e.,...  相似文献   
212.
Internship programs, whereby students are employed on a full‐time basis while studying part‐time for a degree, are increasingly popular. This paper discusses an analytical framework which is helpful in evaluating, from the student's perspective, alternative internship programs. The methodology is illustrated by a detailed analysis of two internship programs currently available in N.S.W. Other options such as full‐time study, with and without part‐time employment, are also analysed. Comparison of the internships and other options reveal substantial differences in life‐time earnings, rates of renumeration and implicit trade‐offs between income and leisure. Non‐monetary differences may also be substantial.  相似文献   
213.
214.
This study examined the reliability of the Mantel-Haenszel indexes across different samples of test takers as well as across sample sizes and investigated whether these indexes are robust to item context effects. Mathematics data from the Second International Mathematics Study (SIMS; 1985) for U.S. eighth-grade students were analyzed. The results suggest that the MH D-DIF is robust to item context effects. However, larger sample sizes than those used in this investigation (N = 141-167 for the focal group) may be necessary to obtain stable estimates from the Mantel-Haenszel procedure.  相似文献   
215.
216.
217.
Employers optimally pursue activities which facilitate the coordinating of employee characteristics and the requirements of the job. One allegedly important employee characteristic is the level of education. Employees with higher levels of education are rewarded with higher wages than employees with lower levels. This may occur if higher levels of education make an employee truly more productive or if because of an employer's beliefs only those individuals with higher levels of education are allowed to enter the higher paying positions (occupational screening).The above propositions are testable, depending crucially upon the theoretical model employed for determining occupational choices. We shall compare the implications of two possible occupation choice models: (1) enter the job which offers the highest lifetime income, (2) enter the job which offers the highest level of overall satisfaction. We estimate these two models using the NBER-TH data sample. By distributing our estimated results and the actual distribution of occupations over the education levels of high school, some college and BA we can see if more or less people are expected to enter specific occupations at each education level. Support for screening exists if more people are expected in high status occupations at low education levels than are actually in those occupations.When comparing the estimated results for each model we see different outcomes emerge. The latter indicates that screening does not exist while the former does. We present arguments as to why we feel that the second model is the more correct and appropriate and, consequently, why we feel that education is not an effective screening device.  相似文献   
218.
219.
OBJECTIVE: This study had two aims: First to examine psychosocial correlates of child maltreatment risk, and second to assess the validity of the CAP Inventory (Milner, 1986) with multiply disadvantaged teenage mothers. METHOD: Participants were 75 adolescent mothers who were wards of the Illinois child protection system. Mothers (aged 14-18) and infants participated in home-based psychosocial assessment of personal and parenting functioning. Group comparisons examined differences for mothers with elevated versus normal versus invalid CAP scores due to faking good. RESULTS: Findings indicated that abuse risk groups differed on emotional distress, social support satisfaction, reading achievement, and years of education, but not on parenting beliefs or quality of child stimulation. Differences favored the normal over the elevated risk group in all significant comparisons, whereas mothers with elevated faking good differed from normals only in lower reading achievement. Multiple regression analysis highlighted emotional distress, support dissatisfaction, and low achievement as significant predictors of greater abuse risk. CONCLUSIONS: Despite sharing multiple disadvantages, adolescent wards are a heterogeneous group who show different levels of psychosocial functioning corresponding to levels of child maltreatment risk. The findings provide support for the concurrent validity and clinical applicability of the CAP Inventory with disadvantaged teenage mothers.  相似文献   
220.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号