下列哪项为胸部损伤时行急诊室剖胸的指征()
A.胸内持续大出血
B.支气管破裂并皮下气肿
C.急性心脏压塞
D.气胸、肺压缩70%
E.胸腔内异物
参考答案:C
We _____________ martial arts at the gym when we heard the news. [ ]
A. are playing
B. are doing
C. were playing
D. were doing
出票人持用于转账的支票向开户社提示付款的,()在支票背面作成委托收款背书。
A、必须
B、无需