闭式引流的指征是
A．胸壁反常呼吸
B．多根多处肋骨骨折
C．胸内异物存留
D．血气胸经穿刺抽吸无效
E．血气胸
参考答案：E
最可能的诊断是
A．冠心病心绞痛
B．二尖瓣关闭不全
C．主动脉瓣狭窄
D．肥厚型梗阻性心肌病
E．病毒性心肌炎
They are going to learn to play______ guitar and play ______ basketball
A．/, the
B．a; the
C．the; a
D．the; /
