气胸的手术适应证有（）
A.内科保守治疗无效
B.复发性气胸、血气胸、开放性气胸
C.慢性气胸
D.以上都是
参考答案：D
In order to improve English，________.
A．Jenny’s father bought her a lot of tapes
B．Jenny bought a lot of tapes for herself
C．a lot of tapes were bought by Jenny
D．a lot of tapes were bought by Jenny’s father
李密《陈情表》称“且臣少仕伪朝，历职郎署”，这里的“伪朝”指（）
A.曹魏
B.东吴
C.蜀汉
D.西晋
