根据已知主视图、俯视图和形体直观图，给出的A-A剖视图是正确的(剖面材料：钢筋混凝土）<br /> According to the given pictorial drawing and the front and top views ,the sectional view A-A is right.<br /> （material: reinforced concrete）<img src="https://static.zxtiku.com/wangke/imgs/topic/944669b27bb0563acb7ad70710f64068.jpg"/><br /> A、正确<br /> B、错误