可用于输送硫酸的管材有()。A、铸铁管 B、无缝钢管 C、铅管 D、铜管 发布时间:2020-04-19 15:17 │ 来源:www.tikuol.com 题型:单项选择题 问题: 可用于输送硫酸的管材有()。A、铸铁管B、无缝钢管C、铅管D、铜管
题型:单项选择题 As is known to all, the financial crisis firstly broke out in the United States,_____ the group of developed countries. A.belonging toB.belonged toC.belongs toD.is belonged to 查看答案