双腔支气管插管的主要目的是（）。
参考答案：使健康肺和病侧肺的气道隔离通气
The IPCC announcement three years ago that "most of the warming observed over the last 50 years is" ______.
A．possibly due to human activities
B．possibly because human activities
C．due to likely human activities
D．human activities likely attributable
小儿肺炎发生心力衰竭时应立即给予（）
A.毛花苷C（西地兰）
B.呋塞米（速尿）
C.地塞米松
D.多巴胺
E.酚妥拉明
