患者,男,29岁,出现恶心呕吐,呕吐物较多带粪臭味,该患者可能是
A.胃潴留
B.肠梗阻
C.尿毒症
D.中毒
E.幽门梗阻
参考答案:B
阅读理解。
This is my family photo. My grandfather's name is Henry Hand. My grandmother's name is Helen Hand.
My. father's name is Frank Hand. My mother's name is Mary Hand. Frank and Mary are my parents. My
name is Em- ma.I'm an English girl.I love my family very much.
1. What's Emma's last name?
_______________________________
2. Is Frank Helen's son?
3. Who is Emma's mother?
______________________________
4. Is Helen Emma's mother?
5. Is Emma an English girl?
______是描述数据库中记录间联系的数据结构形式,它是数据库系统用以提供信息表示和操作手段的形式框架。