1. CONTEMPORARY CLINICAL TRIALS(缩写:CONTEMP CLIN TRIALS)Bimonthly ISSN: 1551-7144 ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, USA, NY, 10010-1710 2. EUROPEAN JOURNAL OF CLINICAL INVESTIGATION
英文演讲稿优秀范文1 Dear teachers and students, Hello! Today, my topic is "protecting the environment and everyone is responsible". Throughout the ages, earths mother has nurtured countless generations of children with sw