() is Bahrain’s hamburger, which is made of beef or chicken with vegetables, wrapped in pita bread. A. Shrimp B. Lobster C. Seafood D. Shawarma 查看完整题目与答案 以下哪些平面属于投影面的垂直面? A. 正平面 B. 铅垂面 C. 正垂面 D. 侧垂