The big snow caused great _______to the people living in the south of China, ________some of them homeless.

A．destroy; left

B．damage; leaving

C．ruin; having left

D．wound; leaving

知识管理的激励机制组成主要有知识运行、知识明晰、知识绩效和（ ）

A．知识分享

B．知识获取

C．知识处理

D．知识奖惩