数据模型是 ______ 的集合。
A.文件
B.记录
C.数据
D.记录及其联系
参考答案:D
— Miss Lin teaches _____ English this term.
— You're lucky. _____ is a very good teacher. [ ]
A. our; She
B. us; He
C. us; She
D. ours; He
试述肝脏病病人手术前注意事项。