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activating agent

n.
1.(mineral extraction) a surface-active chemical used in flotation process to increase the attraction to a specific mineral

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    Idiom of the Day

    squawk about (something)
    to complain about something
    People are always squawking about the bad service in the new restaurant.



    1.
    It's quite clear she's studied the subject very thoroughly and when she lectured, you could tell she ________ her stuff.

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    My Account / Test History
    Invention
    Invention : coins
    Year : c. 650 bc
    Inventor : lydians
    Country : turkey.      .. More >>
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