题目

Ma Yun, head of Alibaba, is one of ________ persons in the world. — Yes. He is now even ______ than Li Jiacheng.A. rich; rich   B. richer; richer C. the richest; richer D. richest; the richest 答案：C恐龙的脚印形成的化石称做( )A. 遗体化石 B. 骨骼化石 C. 遗迹化石 D. 遗物化石