自发性气胸出现（）
A．肺源性呼吸困难
B．心源性呼吸困难
C．血源性呼吸困难
D．中毒性呼吸困难
E．神经、精神性呼吸困难
参考答案：A
-I've some big news for you. You've been accepted as a member of our club.
-_________That's great! [ ]
A. Have I?
B. Pardon?
C. Congratulations !
D. Good idea !
乘坐长江客轮的游客可随身携带的免费行李的体积为 立方米。
