在Rt△ABC中,∠C=90°,a=1,c=2,
则sinA=ac=22.
男性,68岁,因呕血、黑便半日急诊入院。查体:上腹部可扪及包块,X线钡餐检查胃内型呈半圆形充盈缺损,边缘整齐,中央可见脐样的溃疡龛影。
该患者最可能的疾病诊断是()
A.胃癌
B.胃神经纤维瘤
C.胃息肉癌变
D.胃溃疡
E.胃平滑肌肉瘤
—Can I get you a drink?
—That's very nice of you. I've already got _____. [ ]
A. it
B. one
C. that
D. this