情景交际:将下列句子排列成一段完整的对话。

a. No! Sorry! We need it.Your dad and I are going to the movies later.

b. Sure. But could you clean up your room first?

c. Yes, you have to.Or no friends come over again!

d. Do I have to?

e. OK. And Mom, could I use the car to pick my friends up?

f. Mom, could I ask some friends to come over?

排列顺序为                                                

计算题：已知某一移动台的辐射功率为10瓦，频道间隔为25khz，接收机中频带宽为16khz，频偏为5khz，收发信机频率差2khz，最高调制频率为3khz，试求落入邻道接收机的最低边频次数和调频指数。