彩票单双玩法技巧简介：If there are one hundred craftsmen, in addition to the original manpower of the firearms factory, only twenty more people will be needed. If there are two hundred craftsmen, thirty people will be needed. Liu Ruoyu answered.
If there are one hundred craftsmen, in addition to the original manpower of the firearms factory, only twenty more people will be needed. If there are two hundred craftsmen, thirty people will be needed. Liu Ruoyu answered.
