20的基数词和序数词是什么?
问题描述：
20的基数词和序数词是什么?
答
one-first
two-second
three-third
four-fourth
five-fifth
six-sixth
seven-seventh
eight-eighth
nine-ninth
ten-tenth
eleven-eleventh
twelve-twelfth
thirteen-thirteenth
fourteen-fourteenth
fifteen-fifteenth
sixteen-sixteenth
seventeen-seventeenth
eighteen-eighteenth
nineteen-nineteenth
twenty-twentieth