某旋转件规定的平衡精度等级为(),则表示平衡后的偏心速度许用值为2.5mm/s。 A 发布时间:2018-04-06 04:58 │ 来源:www.tikuol.com 题型:单项选择题 问题: 某旋转件规定的平衡精度等级为(),则表示平衡后的偏心速度许用值为2.5mm/s。A.G2.5B.G1C.G3D.G16
题型:单项选择题 第二类防雷建筑物上装设的避雷网的网格,下列四种尺寸中正确的是( )。A.≤10m×15m或≤16m×14mB.≤10m×10m或≤12m×8mC.≤15m×15m或≤12m×8mD.≤30m×30m或≤24m×16m 查看答案
题型:单项选择题 You board an inflatable liferaft that has been hand launched from a sinking vessel. What should you do first after everyone is onboard the liferaft?().A.Cut the painterB.Operate the radio equipmentC.Open the equipment packD.Ventilate the liferaft of CO2 查看答案