下列哪项为大叶性肺炎最常见的致病菌()
A.绿色链球菌
B.流感嗜血杆菌
C.肺炎链球菌
D.大肠杆菌
E.绿脓杆菌
参考答案:C
为保证火检探头的安全,锅炉熄火后应保持火检吹扫风机运行,直至预热器入口烟温<()℃方可停运火检风机。
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