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2. Consider the following orderings.
I. F<Si<Ba II.  S<Te<Se  III. Be<Na<Rb  IV. O<Fe<P
Which of these give the correct trend in order of increasing size?
(A) III
(B) I, II
(C) I, III
(D) I, IV
(E) I, III, IV


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 【站僕】摩檸Morning:有沒有達人來解釋一下?
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2. Consider the following orderings.I. F..-阿摩線上測驗