.—What do you think of the performance yesterday evening?

—Great!              is o’Henry style.

A．The surprising ending

B．The surprised ending

C．A surprising ending

D．A surprised ending

是读取（有时还可以写入）标签信息的设备，可设计为手持式或固定式（）

A.RFID标签

B.天线

C.信号接收器

D.阅读器