音箱属于通信系统组成中的()
A.信息源
B.发送设备
C.接收设备
D.收信者
参考答案:D
连词成句。
1. often my do I homework
2. do What have you on Tuesdays
3. eggplants have tomatoes I and
4. would you What dinner like for
5. my It's favourite fruit
霍夫曼树是带权路径长度最短的树,路径上权值较大的结点离根较近。