外转子无刷电机相对于内转子无刷的优势是（）。
A.转速更高
B.功率更大
C.扭矩更高
D.寿命更长
参考答案：C
清洁生产的目的是实行节能、减污、增效和（）。
A、降耗
B、卫生
C、发展
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.
