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What are the differences between Laws and International Practice?

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What opportunities and challenges have the current international economic situation brought to enterprises (importers and exporters)?

通信的两个主要的性能指标是()和()。

下雨的信息量比阴天信息量大。

A. 对
B. 错

试论述数字通信与模拟通信比较具备哪一些重要的优势。

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