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【简答题】
下列物质在一定条件下都可以作为氧化剂：KMnO 4 ，K 2 Cr 2 O 7 ，CuCl 2 ，FeCl 3 ，H 2 O 2 ，I 2 ，Br 2 ，F 2 ，PbO 2 。试根据标准电极电势的数据，把它们按氧化能力的大小顺序排列，并写出它们在酸性介质中的还原产物。
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had died
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fastest
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【单选题】John's father thought most children went to school by taxi.
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Right.
B.
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C.
Doesn't Say.