20、中国教育科研网一般分为三级网络，分别是主干网、地区网与校园网，校园网一般都联入______。A.主干网B.地区网C.校园网D.以上都不是 - 查题网

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高等继续教育 / 计算机统考

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20、中国教育科研网一般分为三级网络，分别是主干网、地区网与校园网，校园网一般都联入______。
A.主干网
B.地区网
C.校园网
D.以上都不是

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53、Peter arrived home and discovered that he had forgotten his door key. He rang the bell, but nobody came to open the door. He rang again, and waited, but still there was no answer. He walked around the house to see if he could find an open window. But they were all closed. It was beginning to rain and he did not know what to do. Dorothy, his wife, had obviously gone out, and he did not know where she had gone, or when she would return. He waited for half an hour. Still nobody came. Finally feeling wet and angry, he picked up a big stone and threw it through the kitchen window and was climbing through it. When he heard the front door open, his wife came back.统考英语阅读理解

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