胃十二指肠溃疡病死亡最常见的原因是()。
A.急性穿孔
B.上消化道大出血
C.瘢痕性幽门梗阻
D.溃疡恶变
E.溃疡性结肠炎
参考答案:B
解析:[知识点] 胃、十二指肠溃疡的常见并发症
若双曲线方程为x2-y2=1,则双曲线的焦点坐标是______.
To tell you the truth, everyone, including me, won’t _____ your selfness and rudeness.
A.fasten
B.press
C.suffer
D.tolerate