当钢管做灯杆时,钢管内径不应小于()mm,钢管厚度不应小于1.5mm。A、6 B、8C 发布时间:2019-02-23 14:55 │ 来源:www.tikuol.com 题型:单项选择题 问题: 当钢管做灯杆时,钢管内径不应小于()mm,钢管厚度不应小于1.5mm。A、6B、8C、10D、12
题型:单项选择题 While on watch,you notice that the air temperature is dropping and is approaching the dew point.Which type of weather should be forecasted().A.HailB.Heavy rainC.SleetD.Fog 查看答案