规则波导中,导行电磁波的求解是通过______ 法结合______ ______ ((17))场分量,再利用基于______ 方程的______ 关系求得其余分量。
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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。
Weight ton and Measurement ton are used to calculate _________.
A. weight
B. freight
C. volume
D. premium
“Laydays” is a term used to describe the time of ________ agreed upon between ship owner and chartere.
A. shipment
B. arrival
C. loading and unloading
D. insurance
Vessel being grounded is regarded as _______.
A. extraneous risk
B. total loss
C. G.A.
D. fortuitous accident