如图为关节结构示意图，请据图回答问题．

C

    Hello! My name is Jack.I am from England.Now I am in China with my parents.I like China.I like Chinese food，too.I have breakfast at home.I eat an egg，some bread and porridge(粥) for breakfast.I don't like milk.I have no time to go home for lunch，so I have it at school.The lunch at school is very good.I often have noodles and dumplings.Noodles are my favourite food. Sometimes I have different foods for lunch.I eat rice，meat and vegetables.I always go home early in the afternoon.Then I do my homework.I have supper with my parents.Sometimes we go out to have dinner with our friends.We are happy in China.

一个民族的文化，凝聚着这个民族对世界和生命的历史认知和现实感受，积淀着这个民族最深层的精神追求和行为准则。阅读材料，结合所学回答下列问题。

材料一：如图

材料二：造纸术是我国古代四大发明之一，造纸术的发明是中国对世界文明的伟大贡献之一。

材料三：“顺天时，量地利，则用力少而成功多。任情返道，劳而无获……”

──《齐民要术•种谷》