题目

These cute seabirds have wings, but they cannot fly. They wear a black or blue-grey overcoat, and they have a white belly, a pair of short legs, and two wings that serve as flippers (脚蹼). There are 18 types of them. We must look at their heads and necks to tell one type from another. Some have a pair of long, yellow eyebrows, some have a rock star hairstyle, some have lemon-yellow and orange markings on their cheeks (脸颊), and some just have no special markings at all. When these seabirds walk on land, they look clumsy (笨拙的). Yet, when they dive into the water, they become excelle根据平面镜成像特点，在图中画出物体AB所成的像．