已知⊙O1和⊙O2的半径分别为3cm和5cm,且它们内切,则圆心距O1O2等于( 发布时间:2017-04-30 00:14 │ 来源:www.tikuol.com 题型:填空题 问题: 已知⊙O1和⊙O2的半径分别为3cm和5cm,且它们内切,则圆心距O1O2等于( )cm。
题型:填空题 Would you please supply ______ a complete set of catalogues for textile accessories so that we may make choice and work on them.A.usB.us withC.us byD.us for 查看答案