呕血最常见的疾病是（）
A.胃底及食管静脉曲张破裂
B.慢性胃炎
C.消化性溃疡
D.急性胃黏膜病变
E.肠憩室病
参考答案：C
The driver could have survived but he the seat belt.
A．had been wearing
B．hadn't worn
C．wasn’t wearing
D．didn't wear
胆石症取石手术后，下列哪项是拔除T管引流的指征
A．术后2周，引流量减少，造影通畅B．术后1周，引流量减少C．术后1周，疼痛消失D．术后2周，引流量增加E．术后体温正常，白细胞不高
