PACS系统的基本组成包括下列哪项（）
A.影像输入
B.影像输出
C.影像采集
D.检查应用
E.影像存储
参考答案：B, C, E
When___________help, one often says" Thank you. " or "It's kind of you. " [ ]
A. offering
B. to offer
C. to be offered
D. offered
