.It is reported that two schools,_______fell into ruins in the earthquake, are being rebuilt and will be open next term.

A．they both

B．both of which

C．which both

D．both of them

管理信息系统可以分为不同类型，人才管理信息系统属于( )。

A) 事务型管理信息系统
B) 办公型管理信息系统
C) 专业型管理信息系统
D) 企业型管理信息系统