金属板材屋面,暴露在屋面的螺栓,须带防水垫圈。( ) 发布时间:2017-07-12 12:46 │ 来源:www.tikuol.com 题型:判断题 问题: 金属板材屋面,暴露在屋面的螺栓,须带防水垫圈。( )
题型:判断题 Not until he failed the exam _______he had left his books untouched .A.did he realizeB.had he realizedC.he realizedD.he had realized 查看答案