题目

My brother_____while he_______ his bike and hurt himself. A . fell; was riding B . fell; were riding C . had fallen; rode D . had fallen; was riding 答案：A下列四个几何体中，已知某个几何体的主视图、左视图、俯视图分别为长方形、长方形、圆，则该几何体是（　　） A．球体 B．长方体 C．圆锥体 D．圆柱体