已知圆C的圆心与点P（-2，1）关于直线y=x+1对称，直线3x+4y-11=0与圆C相交于A、B两点，且|AB|=6，则圆C的方程为（ ）。
.She will tell us why she feels so strongly that each of us has a role ______ in making the earth a better place to live.
A．to have played
B．to play
C．to be played
D．to be playing
汇划系统中发出事务处理状态分为待发送、已发送、（）、已查复。
