据《素问·上古天真论》所述，"肾气盛"，男子见于（）
A.八岁
B.二八
C.三八
D.四八
E.五八
参考答案：B
下行物理资源块（PRB）的大小应该和下行数据的最小载荷相匹配。一个PRB的时域大小为一个时隙，即（）。
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.
