我国的脊椎动物中从种类方面看哪几位位于世界的前列?( ) ①鱼类②两栖类③爬行类 发布时间:2017-05-18 00:46 │ 来源:www.tikuol.com 题型:选择题 问题: 我国的脊椎动物中从种类方面看哪几位位于世界的前列?( )①鱼类 ②两栖类 ③爬行类 ④鸟类 ⑤哺乳类A.①②③B.②③④C.③④⑤D.①④⑤
题型:选择题 Ron can type five forms of a test in 4 hours. Joan can type the same five forms in 6 hours. If they work together, how many hours would it take them to type ten forms of a test ?()A.AB.BC.CD.DE.E 查看答案