目前主要的运营网络有电信网、______和计算机网。
参考答案：有线电视网
句型转换
1. The new car cost my father a lot of money.（改为同义句）
My father a lot of money the new car.
2. Guests in this restaurant in Paris are served by blind waiters.（改为主动语态）
guests in this restaurant in Paris.
3. The foreigner can ride a bike，too.（改为否定句）
The foreigner a bike, .
4. The magazines were taken into the reading room before it began to rain.（对画线部分提问）
the magazines into the reading room?（改为主动语态）
SDH网中常见的度量抖动性能的参数如下（）。
A.输入抖动容限
B.输出抖动
C.映射和结合抖动
D.抖动转移特性
