用于配制高强度砼的石子,石子的针、片状颗粒含量应有所限定。 发布时间:2017-07-10 11:24 │ 来源:www.tikuol.com 题型:判断题 问题: 用于配制高强度砼的石子,石子的针、片状颗粒含量应有所限定。
题型:判断题 --I don't think we have met before.--Yes, once at a party, but we___________.A.weren't introducedB.didn't introduceC.haven't introducedD.were not introducing 查看答案