测速发电机主要有哪两种用途？

A. PDSCPMCH以及PBCH映射到子帧中的数据区域上
B. PMCH与PDSCH或者PBCH不能同时存在于一个子帧中
C. PDSCH与PBCH不能存在于同一个子帧中
D. PDCCPCFICH以及PHICH映射到子帧中的控制区域上

A. Creating, dropping, and modifying tables and indexes
B. Initiating a binary backup of the database by using the START BACKUP command
C. Displaying replication status information
D. Shutting down the server by using the SHUTDOWN command
E. Creating and dropping databases
F. Creating and administering user