1. All seeds need _____, oxygen and the right temperature to come up. (Page 10)A. sunlight B. mineral C. water2. About _____ percent of all plants are flowering plants. (Page 10)
21世纪报社版权所有,未经书面授权,禁止转载或建立镜像。 主办单位:中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号