移动通信中处理的信息包括（）。
A、语音
B、数据
C、指令信息
D、信令信息
参考答案：A, B, D
23×42=﹙ ﹚．
______ people are standing outside the office. _____ people there is at least over 1,000.
A．A number of; A number of
B．The number of; The number of
C．A number of; The number of
D．The number of; A number of
