社区智能化的特征是什么？
参考答案：
1）集成化管理；
2）网络办公；
3）客户服务自动化处理；
4）住宅安全性与舒适度；
5）开展增值服务与服务处理方式。
It was only after he had spent several nights digging around the cross ________ he decided to write to Kit Williams to find out if he was wasting his time there.
A．that
B．how
C．and which
D．what
VBA中使用的3种选择函数，分别是IIf、Switch和______。
