SQL语言具有数据定义、数据操纵和数据控制的功能，它的一次查询的结果是一个______。
A) 表 B) 记录C) 元组 D) 数据项
参考答案：A
板块构造学说认为地球表层由______大板块拼合而成．
I was close to being killed the other day. A car passed me at _____ I thought was a dangerous speed. [ ]
A. as
B. which
C. what
D. that
