Kicking stone balls

    During the Qing Dynasty, kicking a stone ball around was a popular game in the northern part of China, and it was often played in winter to keep warm.

Playing hide-and-seek

    Hide-and-seek is a traditional game for children, popular around the nation. There are two ways to play: covering a child's eyes while other kids run around to tease(戏弄) him or, more commonly, others hide and one child must try to find them.

Flying kites

    Kites have quite a long history. The earliest kites were made of wood, instead of paper. The three most famous kites are the Beijing kite, Tianjin kite and Weifang kite. Each has its own feature. For example, the bird-shaped kite with long wings is a special kind of the Beijing kite.

Watching shadow plays(皮影戏)

    The closest thing to watching a film during ancient times was going to see a shadow play. The artists control puppets(木偶) behind the screen and tell stories to the music.

实验步骤

设计要求

①准备两个大小相同的洁净培养皿，分别标为A、B；选取大小相近、具有完整胚的活大豆种子40颗，经充分浸泡后，随机平均分成两组。

选择合适的实验器材

②将一组每粒大豆种子的子叶均除去一片后，平铺在A培养皿中；将另一组大豆种子____   。

设置对照实验

③将A、B两个培养皿放置在相同的适宜环境中，每天同时浇适量且等量的水。

控制实验条件

    ④每天观察并记录____  ，并进行统计分析。

观察和记录