It was announced that only when the fire was under control ______ to return to their homes.

[ ]

A. the residents would be permitted

B. had the residents been permitted

C. would be residents be permitted

D. the residents had been permitted

下列关于传输信道同步说法中错误的有（）

A.RNC和NodeB之间进行传输信道同步是为了确保下行的数据帧落在NodeB的接收窗口中；

B.当RNC收到的TOA为负，即RNC发送的数据帧落在NodeB的接收窗口之后，则把RNC的发送时机往后调整，CFN减小；

C.当RNC收到的TOA大于TOAWS时，即RNC发送的数据帧落在NodeB的接收窗口之前，则把RNC的发送时机往前调整，CFN增大；

D.当TOA的值落在NodeB的接收窗口之内时，就永远都不会做调整了。