【单选题】植物根毛细胞能从土壤中吸收水分,主要原因是 [ ]
【单选题】第一篇 There seems to be a close relationship between drinks and one's life. The adolescent(少年)usually loves soft drinks for their sweetness and variety. He knows nothing of sadness and his taste of life...
【单选题】2-3 构成细胞的基本物质是( )、( )是( )的生命物质,主要由水分、蛋白质、核酸、脂类、糖类和无机盐等物质组成,( )是植物生长发育的物质基础。
【多选题】以下哪些不是蒙台梭利提出的理论________。
【单选题】There seems to be a strongcompetitionfor senior high school students to enteruniversity.