宁夏沿黄城市带和核心和两翼分别为？
参考答案：
银川、吴忠为核心；石嘴山、中卫为两翼。
Hu Jin had promised that she would meet Li Fang after work, but she didn't _____. [ ]
A. turn on
B. turn down
C. turn off
D. turn up
在智能业务呼叫中，SSP触发智能业务向SCP发送的第一个操作码是：（）
A. Collected User Information
B. Continue
C. Connect to Resourse
D. Initiate DP
