目前给水管道的材料主要是( ),其优点是耐腐蚀、耐久性好、易连接、不易渗漏。 A. 发布时间:2017-12-29 23:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: 目前给水管道的材料主要是( ),其优点是耐腐蚀、耐久性好、易连接、不易渗漏。A.铜管材 B.塑料管材C.铸铁管材 D.铝管材
题型:单项选择题 That party has been in ________ for many years and it has showed its ________ in dealing withmany important problems.[ ]A. power; energy B. power; strengthsC. force; energy D. force; strengths 查看答案