一个十字路口的交通信号灯每分钟红灯亮30秒，绿灯亮25秒，黄灯亮5秒，当你抬头看信号灯时是绿灯的概率是（　　）

    Ann is my classmate. She comes from New York, and she lives in Shanghai with her parents now. Every morning, she goes to KFC to have breakfast. Sometimes she buys a hamburger for me. She can't speak Chinese well. In the evening, her father often helps her with it. He's a teacher in our school. He can speak Chinese very well.

    Ann thinks the school life(生活)in China is very interesting. Ann likes reading Chinese books because she wants to know more about China. She tries(努力)to talk with her Chinese friends in Chinese. She hopes to speak Chinese well. She is very happy to live in China. She loves people here.

阅读文言文，回答问题

       墨者^①有巨子^②腹䵍^③居秦，其子杀人。秦惠王曰：“先生之年长矣，非有他子也，寡人已令吏弗诛矣。先生之以此听寡人也。”腹对曰：“墨者之法曰：‘杀人者死，伤人者刑。’此所以禁杀伤人也。夫禁杀伤人者，天下之大义也。王虽为之赐，而令吏弗诛，腹不可不行墨者之法。”不许惠王，而遂杀之。

       子，人之所私也。忍所私以行大义，巨子可谓公矣。

（节选自《吕氏春秋》）

     【注释】①墨者：指墨家。②巨子：墨家学派对墨家有成就的人称“巨子”。③腹䵍（tūn）：人名。