患者女，出现呕血，呕血最常见的疾病是（）
A.胃炎
B.消化性溃疡
C.胰腺炎
D.急性胃黏膜病变
E.食管、胃底静脉曲张破裂
参考答案：B
I have no idea whether he has sisters, and if he does, _____？[ ]
A. how many sisters does he have
B. he has how many sisters
C. how many he has sisters
D. how many sisters he has
男性，27岁。心悸、气短，胸闷、胸痛，晕厥。查体：胸骨左缘第3肋间3/6级SM。超声：IVS：LVPWl.5：1，SAM征（+）。
超声心动图SAM征指的是（）。
A.二尖瓣前叶收缩期前向运动
B.三尖瓣后叶舒张期向后运动
C.三尖瓣前叶舒张期向前运动
D.二尖瓣后叶与前叶同向运动
E.主动脉瓣收缩期向前运动
