When we practice English speaking, we often end up ____ in Chinese.

     [ ]

A. speak

B. spoken

C. speaking

张力性气胸急救原则中首先应是（）

A.剖胸探查

B.气管内插管辅助呼吸

C.输血、输液治疗休克

D.气管切开

E.立即排气解除胸腔的高压状态