题目内容

在均匀无耗传输线上,电压的 ______ ((29))之比,称为电压驻波比,其模值范围为 ______ 。它只反映_((31))的程度,并不反映其_((32))关系。

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Weight ton and Measurement ton are used to calculate _________.

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D. premium

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A. shipment
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C. loading and unloading
D. insurance

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A. extraneous risk
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A. L/C
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C. B/L
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