实时流式传输，保证媒体信号带宽与网络连接配匹，需要专用流媒体服务器与传输协议。()

A. The president himself will attend the opening ceremony.
B. You think too much of yourself.
C. The boy will be himself in no time.
D. She made herself a fine dress.

A. be abolished
B. were abolished
C. were to be abolished
D. must be abolished

A. Three weeks was allowed for making the necessary preparations.
B. Tom, more than anyone else, is anxious to go there again.
C. Not only the teacher but also his students object to the change.
D. Both bread and butter was sold out in that grocery.