用户框里，ASL、DSL、AVM、DCN槽位兼容。
参考答案：对
关系数据模型由关系数据结构、关系操作集合和 【2】 三大要素组成。
Eight children were killed and five were wounded the second knife attack that happened in Fujian Province on March 23,2010.
A．as a result of
B．as for
C．in addition to
D．in favor of
