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It wasfine a day yesterday we all went out for a picnic.

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This isa useful dictionaryI'm thinking of buying it.

They are interesting booksI want to read them once more.

节点电压法中,当电流源流入节点时,前面取号,流出节点时,前面取号

A. +,-
B. -,+
C. +,+
D. -,-

节点电压方程的一般形式中G11和G22分别为节点1,2的( )

A. 自导
B. 互导