1970年美国IBM公司的()奠定了关系数据库的理论基础,他是关系模型的创始人。
A、Neumann
B、E.F.codd
C、Wilkes
D、Richie
参考答案:B
_____ twelve, Mike started his first novel. [ ]
A. In the age of
B. At his age of
C. At her age of
D. In his age of
下列关于慢性硬膜外血肿错误的是
A.伤后3天~1周出现临床症状
B.青年男性多见
C.好发于额、顶、枕区
D.较为少见
E.对于需要手术者,绝大多数需骨瓣开颅,血肿清除术