There is a store near my home. It is big. It has lots of things in it. You can buy school things like notebooks, pens, pencil cases, rulers and maps. You can also buy drinks, vegetables, fruit and all kinds of food. It doesn't sell clothes. Some of them are cheap. But some of them are expensive.

    People in the store are very friendly(友好的). They work from eight in the morning to eight in the evening. They work hard(努力地)all day.

①是逆反心理，应任其自然发展

②是逆反心理，会给自己和家人带来伤害

③会影响家庭关系的和谐

④是品行恶劣的不健康的行为

历史图片往往包含着丰富的历史信息和内涵，下列图片中最能将中国人民的聪明才智和高超雕塑技术有机结合在一起的是（  ）

下图是一个长方形，长12厘米，宽8厘米。在这个长方形中剪出一个正方形，能剪出的最大的正方形的周长是____厘米，  剩下的图形是一个____形。