谜语：正看三条边，侧看三条边，上看圆圈圈，就是没直边（打一几何体）______．
根据题意可得：此几何体为圆锥．
故答案为：圆锥．
乙酰甲胺磷
Liu Hulan would rather________in face of the enemy.[ ]
A．die than to give in
B．die than giving in
C．die than give in
D．have died than have given in
