静止煤采样应在装、堆煤或卸煤过程中进行。
参考答案:对
I ‘ ll help you_________.
A.as much as I can
B.as possible as I can
C.as many as possible
D.as many as I can
砖墙砌体可留直槎时,应放拉结钢筋,下列哪一条不正确?()
A.每1/2砖厚放一根钢筋
B.拉结钢筋沿墙高间距大于500mm
C.留槎处算起钢筋每边长大于500mm
D.端部弯成90°弯钩