第2题: [单项选择]正常人双侧总鼻阻力平均为() A. 0.126~0.328kPa·s·L-1 B. 0.357~0.524kPa·s·L-1 C. 0.524~0.694kPa·s·L-1 D. 0.694~0.765kPa·s·L-1 E. 0.894~0.968kPa·s·L-1 参考答案:A
A. absorbs rains B. makes food C. sucks liquid D. faces sunlight 参考答案:B 答案解析:[解析]从文章第六句:Because the cactus has no leaves,it seems to do the job of making food for the plant and