急性肾炎尿量甚少时哪种利尿剂慎用或不用（）
A.呋塞米
B.氢氯噻嗪
C.螺内酯
D.利尿酸钠
E.利尿合剂
参考答案：C
John was about to go back to sleep ______ suddenly his bedroom became as bright as day．
A．after
B．when
C．while
D．until
轴抽风机全部故障时不须停机。
