铁路专用通信是由路外通信、站场通信及会议电话三部分组成。

When we announced Java 2 Micro Edition (J2ME) a few years ago, we believed that Java had an important role to play in hand held devices. Some were (66) that Java would be small enough for such limited devices. But no (67) , Java for the small device is a success. J2ME has emerged ply in the wireless market. Java’s portability and extensibility have brought about rapid (68) in this market. The success of Java beyond desktop computers is significant (69) developers. Java literacy is now more important than ever, as Java is used more and more to (70) a whole range of new computing devices—not only wireless handsets but also personal digital assistants, cameras, automobiles, home control, and so on.

（68）处填（）。

A．adopt

B．adoption

C．adopting

D．adopted