91.You will find as you read fiats book that you just can’t keep some of these stones to ______. You will want to share them with a friend.

A．itself

B．yourself

C．himself

D．themselves

TD-SCDMA系统中的小区同步是4步过程：搜索DwPTS、扰码和基本midAmble码标识、控制多帧同步和（）。