麻醉机其中一个呼/吸活瓣失灵（） ["低氧","高CO2","两者均有","两者均无"] 对分泌性中耳炎行鼓膜穿刺术符合哪项治疗原则（）。 ["改善中耳通气引流","清除中耳积液","改善咽鼓管功能","病因治疗","上述都是"] 显像剂在病变组织中的浓聚明显低于周围正常组织，此种显像称为：（） ["热区显像","冷区显像","早期显像","延迟显像","阳性显像"] 适合腔内介入治疗的疾病是（） ["癌性胸腔积液","癌性腹腔积液","关节腔积液","癌性心包积液","以上都是"] 钠石灰失效（） ["低氧","高CO2","两者均有","两者均无"] 汽油吹管火焰由内向外可分混合焰、燃烧焰、以下何项和氧化焰四层（）