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valence

n.
1.(biology) a relative capacity to unite or react or interact as with antigens or a biological substrate
2.(chemistry) a property of atoms or radicals

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    Idiom of the Day

    tie up (someone) or tie (someone) up
    to take all of someone's time
    The meeting tied up the manager so she was unable to answer the phone.



    1.
    He took to (a) reading Times (b) / for better knowledge (c) / of the facts. (d) No error (e)

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    Fact
    In Shakespeare, Rosalind, the heroine of "As You Like It", has more lines than any of Shakespeare's female characters. Cleopatra comes in second with 670 lines and third place belongs to Imogen (Cymbeline), with 591 lines.      .. More >>
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