Look at the picture. Who is the girl? She is my friend. Her name is Alice Black. She is an English girl.

    Alice has a big family. Her grandparents have two daughters and one son — her father. Alice lives with her grandparents, parents, two brothers and one sister. Alice has two dogs — Bobby and Tony. Bobby is black and Tony is white. Alice likes them very much. Alice is a middle school student. She has a good friend at school. Her name is Helen. They are cousins, too.

下列做法属于健康上网的是（    ）

两个大小不同的球在水平面上靠在一起，组成如图所示的几何体，则该几何体的俯视图是（  ）