一到二十的因数答:1,7 8的因数:1,2,4,8 9的因数:1,3,9 11的因数:1,11 12的因数:1,2,3,4,6,12 13的因数:1,13 14的因数:1,2,7,14 15的因数:1,3,5,15 16的因数:1,2,4,8,16 17的因数:1,17 18的因数:1,2,3,6,9,18 19的因数:1,19 20的因数:1,2,4,5,10,20 ...
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,30,40,50,60...答:三十一到四十的话就是thirty依次接一到十的英文。四十一到五十的话就是forty依次接一到十的英文。五十一到六十的话就是fifty依次接一到十的英文。句法功能 序数词在句中可作主语、宾语、定语和表语。The second is what I really need. 第二个是我真正需要的。(作主语)He chooses the second. ...
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 ...