肠外营养支持的适应证是（）。
A.重度烧伤
B.短肠综合征
C.特发性功能性低血糖
D.食管瘘
E.急性坏死性胰腺炎
参考答案：A, B, D, E
Their bright eyes and smiling faces _____ the impression that they were very satisfied. [ ]
A. inspired
B. conveyed
C. pressed
D. clarified
数据库管理系统常见的数据模型有层次模型、网状模型和 ______ 三种。
