以下事物中氟含量排列正确的是（）
A.水果＞调味剂
B.骨骼＞表皮＞腺体
C.水果＞空气＞土壤
D.动物＞植物＞空气
E.茶叶＞海鱼
参考答案：B
下列说法正确的是（ ）
A．负数没有立方根
B．一个数有两个立方根
C．如果一个数有立方根，那么它一定有平方根
D．一个数的立方根与被开方数同号
The nurse is caring for four clients on a step-down intensive care unit. The client at the highest risk for developing nosocomial pneumonia is the one who（）
A. has a respiratory infection.
B. is intubated and on a ventilator.
C. has pleural chest tubes.
D. is receiving feedings through a jejunostomy tube.
