点处

1.
OP r
...相对 电容率为 r ,壳外是真空,则在壳外P 点处( OP r )的场强和电位移的大小分别为[ ] (A) 2 2 0 0 , 4 4 r Q Q E D r r ...
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Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard