问题描述： 1-20的序数词 1个回答 分类：英语 2014-10-14 问题解答： 我来补答 first secondthirdfourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenthtwentieth 展开全文阅读
