1~10,12~20,30~39的基数词,序数词,缩写答:序数词:1first 2second 3third 4forth 5fifth 6sixth 7seventh 8eighth 9ninth 10tenth 序数词缩写:1st , 2nd , 3rd , 4th , 5th , 6th, 7th , 8th ,9th ,10th 2、12~20 基数词:12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen 20 ...