One of the difficulties of dealing with the United States is that the old non-metric measurements are still used in some industries. Here are some common abbreviations printed in bold type. What do they stand for？
    1. 1 h.p.=746 watts
    2. 1 U.S.gall.=3.785 litres[but 1 British （imperial） gall.=4.456 litres]
    3. 1 yd.=0.9144 metres
    4. 1 yd.=3 ft.
    5. 1 in.=2.54 centimetres
    6. 1 oz.=28.35 grams
    7. 1 cwt.=45.359 kilograms
    8. 2.205 lbs=1 kilogram
    9. and， though not really a measurement， 1 doz. boxes=12 boxes
    1. horsepower
    2. gallon
    3. yard
    4. feet
    5. inch
    6. ounce
    7. hundredweight
    8. pounds
    9. donzen