数据库语言由数据定义语言 ______和数据操纵语言(DML)组成，它为拥护提供了交互使用数据库的方法。
参考答案：DDL或数据定义语言
. All the doctors in the hospital insisted that he ____ badly wounded and that he ____ at once.
A．should be; be operated on
B．were; must be operated on
C．was; should be operated
D．was; be operated on
什么是滴虫性 * * 炎？
