楼梯混凝土强度必须达到设计强度的()以上方可拆模。A.50% B.70% C.100 发布时间:2017-06-26 03:00 │ 来源:www.tikuol.com 题型:单项选择题 问题: 楼梯混凝土强度必须达到设计强度的()以上方可拆模。A.50%B.70%C.100%D.无规定
题型:单项选择题 _________ we didn’t know he was a teacher, later someone told us about it.[ ]A. First of all B. At first C. Firstly 查看答案