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   46945篇
  免费   1878篇
  国内免费   10篇
  2019年   613篇
  2018年   784篇
  2017年   778篇
  2016年   808篇
  2015年   567篇
  2014年   765篇
  2013年   3532篇
  2012年   1341篇
  2011年   1459篇
  2010年   871篇
  2009年   886篇
  2008年   1250篇
  2007年   1265篇
  2006年   1202篇
  2005年   1055篇
  2004年   1060篇
  2003年   966篇
  2002年   989篇
  2001年   1395篇
  2000年   1367篇
  1999年   997篇
  1998年   568篇
  1997年   453篇
  1996年   454篇
  1992年   788篇
  1991年   790篇
  1990年   786篇
  1989年   782篇
  1988年   765篇
  1987年   708篇
  1986年   741篇
  1985年   790篇
  1984年   632篇
  1983年   609篇
  1982年   495篇
  1981年   470篇
  1979年   732篇
  1978年   569篇
  1977年   452篇
  1976年   491篇
  1975年   623篇
  1974年   701篇
  1973年   747篇
  1972年   618篇
  1971年   568篇
  1970年   523篇
  1969年   580篇
  1968年   707篇
  1967年   633篇
  1966年   599篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
231.
The Rosenberg Self-esteem Scale was administered to 550 14- and 16-yr.-old (+/- 6 mo.) girls. Self-esteem scores were categorized by weight and weight by height. Scores on the Quetelet Index for obesity were correlated with self-esteem scores. Mean self-esteem of the low- and middle-weight by height group was significantly higher than the mean of the high-weight by height group. In analyzing weight alone, the self-esteem of the middle-weight group was significantly higher than the self-esteem of the high-weight group. The correlation of the obesity index and self-esteem indicated that as weight increased self-esteem decreased.  相似文献   
232.
Observations on three children with neurolisteriosis (one case of meningitis, two cases of meningoencephalitis, each Serovar 4 b), show that even after the neonatal period, listeriosis must not be ignored in the process of diagnosis and therapy. It is the bacteriological examination of the cerebrospinal fluid, together with the blood culture, and not clinical symptoms and serology that guarantee a timely diagnosis and therapy (ampicillin and gentamicin).  相似文献   
233.
234.
235.
236.
237.
238.
Previous research has suggested that women with a negative emotional orientation toward sexuality (i.e., erotophobia) have difficulty learning and retaining sexually relevant material such as contraceptive information. It has been hypothesized that these women become aroused by this material and that this arousal interferes with their ability to learn it. The importance of this issue led us to conduct the current study. Erotophobic and erotophilic women viewed presentations about contraception while their physiological responses were being monitored. In addition, they were tested on the information contained in the presentation before, immediately after, and again 4-6 weeks after the presentation. The results indicated that the erotophobic women knew less contraceptive information before the presentation and were more aroused by the presentation. This arousal, however, did not interfere with retention of the material. These results are discussed in terms of individual differences in reactions to sexual material and the ability to learn, retain, and use contraceptive information.  相似文献   
239.
240.
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