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什么是二端网络、有源二端网络？无源二端网络？

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搜索结果不匹配？点我反馈

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在电路中，负载获得最大功率的条件是什么？

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试述电压和电位的异同，若电路中两点电位都很高，则这两点间电压是否也很高？

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The draft used in collection is________.

A. a banker’s draft, based on bank credit
B. a commercial draft, based on bank credit
C. a banker’s draft, based on commercial credit
D. a commercial draft, based on commercial credit

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Under collection once the importer refuses to pay, the___will be responsible for the cargo release, customs clearance , warehousing, and reselling in the importing country.

A. drawee
B. collecting bank
C. principal
D. presenting bank

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