题目

阅读理解。Hi, my name is Sarah. I am in Grade Six. I have many friends in my class. John is a smart boy and he is thinner than me. Lily is heavier than me. She is very cute. Zhang Peng is stronger than me and he is very friendly. Mike and Wu Yifan often play together. They are good at sports. Mike’s feet are bigger than Wu Yifan’s, but my feet are smaller than Wu Yifan’s. I love my friends. What about your friends?【1】Wu Yifan’s feet are smaller than Mike’s. （______）【2】I’m heavier than Lily. （______）【3】John is thinner than me. （______）【4】I’m strong已知平行四边形ABCD，∠A=60°，AB=2a，AD=a．请计算两条对角线的长度．