在下列表述中,()项是错误的。 ["少筋梁在受弯时,钢筋应力过早超过屈服点引起梁的脆性破坏,因此不安全","适筋梁破坏前有明显的预兆,经济性安全性均较好","超筋梁过于安全,不经济","在截面高度受限制时,可采用双筋梁"]
半夏因仲夏()而得名。 ["开花","结果","干枯","可挖其块茎"]
一般情况下,鼠标的左键用于()。 ["放弃","选择","确认","退出"]
血清清蛋白的正常值是()。 ["20~50g/L","35~53g/L","30~65g/L","25~53g/L","30~45g/L"]
减速器齿轮有裂纹和()应报废 ["A、磨损","B、沟槽","C、腐蚀","D、断齿"]
站内各股道有何用途?