单项选择题
A.30%~40% B.40%~50% C.50%~60% D.60%~70% E.70%~80%
A.隆起 B.龛影 C.黏膜柔软无破坏 D.环堤 E.项圈征
A.胃癌 B.慢性胃窦炎 C.胃溃疡 D.胃淋巴瘤 E.胃间质瘤