阅读短文，判断正(T)误(F)。

      Mike and Amy are very good friends. They like sports. But their favourite seasons are different. Mike likes

spring best. Because he can fly kites with his friends. Amy's favourite season is summer. She can swim with

her parents in the sea. Mike and Amy like to ski on the snow. They can make a snowman.

( ) 1. Mike likes summer best.

( ) 2. Amy likes to swim.

( ) 3. Mike can ski on the snow.

( ) 4. Amy's favourite season is spring.

( ) 5. They can make a snowman.

CDMA系统中相邻的两个PN偏置间有（）的间隔

A、64chips

B、32chips

C、4chips

D、1chips