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cytotoxicity

n.
1.the degree to which something is toxic to living cells

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    Idiom of the Day

    die out
    to die or disappear slowly until gone, to not exist anymore
    The campfire slowly died out and we went to bed. Dinosaurs died out many years ago.



    1.
    Choose an idiom to replace the expression in the brackets:
    The request by the employee is absolutely (impossible).

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