参考答案:B答案解析:[听力原文]M: I’m going to be up all night studying for my exam.W: Do you really think that’s wis
男性,50岁,"胃痛"史15年,近年来消瘦、乏力,持续性呕吐宿食,胃痛规律改变,伴腰背痛。
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