当将局部E-R图集成为全局E-R图时，如果同一对象在一个局部E-R图中作为实体，而在另一个局部E-R图中作为属性，这种现象称为 【13】 冲突。

That hall is________ this one. Let's go to ________ one.

A．three times the size of；a big

B．three times as big as；the bigger

C．three times bigger than；a big

D．three times as bigger as；the bigger