Have you ever heard of “3G”? Third-generation(代) mobile phone, known as 3G are popular recently. Users can surf the Internet and enjoy videos on their phones. Firstly, for some forgetful people, they will get into trouble if they forget some important things. Now you don’t need to (__小题1:____) it any more. A 3G phone can receive video news programs and messages. Secondly, you are never afraid of losing your way home. 3G phones offer map services so that they can (__小题2:____) just by pressing(按) a few keys on your phone. The most important part of the 3G technology is video calling. You can (_小题3:____) your friends and family face to face on your phone.

It’s believed to bring people convenience in their daily lives.

LKJ系统为了便于维护或扩充接口，具体安装时可能会增加相应的接线盒。