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已知 IP 地址是 141.14.72.24,子网掩码是 255.255.192.0。网络地址是()

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128.14.32.0/20 表示的地址块共有 ()个地址。

You will hear five dialogues and decide what each dialogue is about. Write one letter (A-E) next to each numbered dialogue.

Work with your partner to match each question or statement in Column A with one in Column B to form a short dialogue.

市场营销环境的类型只包括宏观环境和微观环境。

A. 对
B. 错

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