水泥混合砂浆的强度等级可分为( )A、M5, M7.5, M10, M15, M20, M25, M30B、:M5, M7.5, M10, M15C、M5, M7.5, M10D、:M5, M7.5, M10, M15, M20
水泥混合砂浆的强度等级可分为( )
A、M5, M7.5, M10, M15, M20, M25, M30
B、:M5, M7.5, M10, M15
C、M5, M7.5, M10
D、:M5, M7.5, M10, M15, M20
发布时间:2025-08-02 15:08:23