MS Registration的作用（）

A:告诉BSS位臵信息与状态，以便在作为被叫的时候，能够有效寻呼到手机； B:在时隙模式下，是由手机提供SLOT_CYCLE_INDEX，以便BSC能知道手机在监听哪个时隙； C:告知BSS手机类别与协议版本以便基站知道手机的能力； D:进行位臵更新。

RAS（Registration Admissionand Status）是（）和（）之间交互的信令集合。

A:SC B:RM C:节点 D:数据库

Anyone not paying the registration fee by the end of this month will be ______ to have withdrawn from the program.

A:contemplated B:deemed C:acknowledged D:anticipated

Anyone not paying the registration fee by the end of this month will be ______ to have withdrawn from the program.

A:contemplated B:deemed C:acknowledged D:anticipated

Passage2
Swapping postcards has become an interesting hobby for people who are curious about the big world in which they live . Swapping postcards can keep pen friends in touch . A postcard is a simple and beautiful way for someone to share his thoughts and memories .
There are some great websites that can help one develop his interest in postcard swapping . For example,postcrossing. com,started in 2005 by a Portuguese citizen,is a free website that connects people who share a passion for swapping postcards. If you want to receive postcards from other members ,you should e-mail a postcard to the address sent by the website after registration(注册) . After the individual confirms that he has received the card, your name will be added to the list of people to receive postcards .
Swapping postcards with people in other countries is also a great way to learn about the world;each postcard can be a window to another culture. It is like bringing the world to your mailbox.
Fiona, a member of postcrossing. com,says,"I love swapping postcards!Although it seems quite time-consuming to pick one ,write it and post it ,it is the amusement of receiving a flash of sunshine or humor that makes it worthwhile. /
Which of the following is true of postcrossing. com

A:Its members should pay for registration B:It was created for a particular purpose C:Its members can share different hobbies D:It was started by a group of citizens

It is ______(legal) to set up a company without registration.