弹性体改性沥青防水卷材低温柔性3mm厚度卷材弯曲直径(),4mm、5mm厚度弯曲直径 发布时间:2017-10-18 01:43 │ 来源:www.tikuol.com 题型:单项选择题 问题: 弹性体改性沥青防水卷材低温柔性3mm厚度卷材弯曲直径(),4mm、5mm厚度弯曲直径()。A.30mm、30mmB.30mm、40mmC.30mm、50mmD.40mm、50mm
题型:单项选择题 He is the only one of the students who ______a winner of a scholarship for three years. A.isB.areC.have beenD.has been 查看答案