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￠ùBa￡¨OH￡?2 oíCuSO4 ____________________________________￡?
￠úCuOoíH2SO4 _____________________________________￡?
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￠ùFe+Cu2+=Fe2++Cu _______________________________________￡?
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Hothouse plants do not possess exuberant vitality. 温室里的花草不会有强大的生命力. 
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