普通粘土砖按Al2O3含量可分为.一等,二等和三等,一等粘土砖Al2O3含量应大于( 发布时间:2019-11-09 05:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: 普通粘土砖按Al2O3含量可分为.一等,二等和三等,一等粘土砖Al2O3含量应大于()A.30%B.35%C.40%
题型:单项选择题 — What is she ? — She is . [ ]A. does, sit B. does, sits C. does, sitting D. doing, sitting 查看答案