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nickel-iron accumulator

n.
1.a storage battery having a nickel oxide cathode and an iron anode with an electrolyte of potassium hydroxide

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    Idiom of the Day

    hang (someone) in effigy
    to hang a dummy of a hated person
    The demonstrators hung the dishonest politician in effigy.



    1.
    Choose an idiom to replace the expression in the brackets:
    I always (watch my backpack very carefully) when I am downtown.

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