问题
填空题
组成数据通信网络的基本要素为（）、（）和（）三项。
答案
参考答案：信源；信缩；传输系统
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组成数据通信网络的基本要素为（）、（）和（）三项。
参考答案：信源；信缩；传输系统
I'm thinking about what I'm going to do this summer. Maybe I'll get a job. If I get a job, I'll have ____money to buy some new things. I'd like to have some new dresses ____ I start school again in September. I can also buy some books or some music CDs. I really love jazz(爵士乐)．I could buy some more CDs____my jazz collection. Or I can use the money ____tennis lessons. I can play tennis ____，but I'd like to learn to play it much better. Or maybe I can use the money to pay for the piano lessons.I'd like to learn to play the piano，too. If I don't get a job this summer, I'll visit my grandparents in San Francisco. They live in a beautiful old house ____ the sea. My grandparents are always very nice to me. They'll let me sleep late. I ____ have to get up until 10 o'clock every day. I'll eat delicious food because my grandmother is an excellent ____. She always cooks my favorite food. I'll also go to the ____ with my grandparents. Because I like swimming in the sea. My grandparents like to go to museums but I don't enjoy it so much, so maybe I'll ____to watch TV.
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