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