【单选题】Owing to unusual shortage () stock, this offer is made subject to the goods ()unsold.
【简答题】Owing ______ unusual shortage of stock, this offer is made, subject to the goods being unsold.
【单选题】透照板厚一定且有余高的焊缝,散射比随有效能量的提高而()
【单选题】透照板厚一定且有余高的焊缝,散射比随有效能量的提高而( )。
【判断题】列车、机车车辆、单机开始退行时,应鸣示退行信号二长声。( )
【判断题】列车、机车车辆、单机开始退行时,应鸣示退行信号二长声。
【单选题】透照板厚一定且有余高的焊缝,散射比随有效能量的减少而