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oxygen mask

n.
1.a breathing device that is placed over the mouth and nose

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Word of the Day

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  • oxycephaly
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  • oxygenase
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  • oxygenate
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  • oxygenated
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  • oxygenation
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  • oxygenise
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  • oxygenize
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  • oxylebius
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  • oxylebius pictus
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    Idiom of the Day

    throw up one's hands (in defeat)
    to give up trying, to admit that one cannot succeed
    The professor threw up his hands and decided to let the students go home early.



    1.
    The teacher ordered (a) / the sutdents to (b) / open page 10. (c) / No error (d)

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    My Account / Test History
    Invention
    Invention : post-it notes
    Year : mid-1970s
    Inventor : arthur fry (3m)
    Country : us.      .. More >>
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