根据短文理解，选择正确答案。

    Lu Xun is one of the greatest Chinese writers of the 20^th century. Besides his famous stories, he also wrote many influential articles about the living conditions of Chinese people.

    Born in 1881 to a wealthy family, Lu Xun had a happy childhood. In 1893, however, his grandfather, a senior government official, was put into prison for taking money. At the same time, his father became seriously ill. From that time on, his family were no longer accepted by their relatives and friends. These early experiences greatly influenced his writing.

    By the time Lu Xun arrived in Nanjing to study at university in 1899, he already believed that Chinese society had to change and become modern. In 1902 he went to study in Japan. There, he began writing articles for several Chinese student magazines. He showed a gift for writing and translating and he even wrote several books, although none was popular. He returned to China in 1909 because he was in need of money.

    After working for several years as a teacher in Beijing, Lu Xun again returned to writing. In 1918, he wrote his famous short story Diary of a Madman. It was the first Chinese novel published using the everyday language that people spoke, which helped make it a great success. This, together with his novel The True Story of Ah Q

A、B是两个轻质泡沫小球，C是用毛皮摩擦过的橡胶棒，A、B、C三者之间相互作用时的场景如图所示，由此判断（   ）

    Gift giving is different from culture to culture and person to person.

    When giving gifts, sometimes color is important. For example, for many Chinese people around the world, red is a lucky color, and people often like to pack gifts in this color. However, did you know that in Korea, red is a color of death? That is why you should not pack gifts in this color if you are giving a gift to a Korean person.

    What about western countries? In western countries, the color of packing paper is not really important. But color does matter when giving flowers, especially roses. You should not give red roses to a western person you don't know very well because they are a symbol of love. You could give yellow roses instead as these are a symbol of friendship. You could also send pink roses as gifts to say thank you.

    What other things should you remember when giving gifts to someone from a different culture? Well, one thing you should keep in mind is the person's religion. When choosing a gift for a Muslim or Jewish friend, you should never get good food including pork or things made from pigskin. Another thing that you shouldn't get for a Muslim person is alcohol.