CMP技术所采用的设备有抛光机、后CMP清洗设备、抛光终点检测及工艺控制设备、废物处理和检测设备等，其中（）是最重要的设备。

单项选择题The main idea of the story is that（）.

A.what dream is
B.people like to sleep
C.dreams are live films
D.we always remember dreams

单项选择题When we dream，（）.

A.our mind still works
B.we remember something happened before
C.we start to thinking about the work
D.we have new ideas