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4. Which of the following formulas would be expected for a compound between arsenic and fluorine?
(A)AsF4 
(B)AsF3 
(C)AsF2 
(D)AsF


答案:B
難度: 適中

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 【站僕】摩檸Morning:有沒有達人來解釋一下?
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4.Which of the following formulas would ..-阿摩線上測驗