分式x2-9x-3的值为零，那么x2-9=0，
解得x=3或-3．
x-3≠0，解得x≠3．
∴x的值是-3．
故答案为-3．
She sent me a picture of _____ that _____ five years ago. And the picture made me think of the time
we spent togetner. [ ]
A. my, taken
B. her, is taken
C. us, was taken
通信电源设备缺陷率指标属（）类指标。
A.通信规模
B.通信运行
C.通信服务能力
D.通信管理
