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hydrogen chloride

n.
1.a colorless corrosive gas: HCl

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  • Idiom of the Day

    knit one's brow
    to wrinkle one's brow by frowning
    The teacher knit his brow and looked sternly at the child.



    1.
    If I was you (a) / I would have (b) / terminated his services then and there. (c) /No error (d)

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    Fact
    The term the whole 9 yards came from W.W.II fighter pilots in the South Pacific. When arming their airplanes on the ground, the .50 caliber machine gun ammo belts measured exactly 27 feet, before being loaded into the fuselage. If the pilots fired all their ammo at a target, it got the whole 9 yards.      .. More >>
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