“我们生活在一个充满奇迹的时代，大车不需要马拉，新闻通过环绕地球的电线一瞬间传遍世界……”此生活最早出现在（    ）

    Bob and Sue are in the same school，1they are in different classes.After school，Bob and Sue often play games with their friends.Class begins at eight in the morning.Now Bob and Sue are in2own classrooms.They are3to their teachers.Bob is studying English.Sue is having an art lesson.She4to make a birthday card5her mother.

    Her teacher Miss Li is helping her.

请画出图中的折射光线.

先计算各部分的百分率和圆心角的度数．

苹果树：1400÷(1400＋760＋1840)=35％

360×35％=120°

梨树：

桃树：

果园里种水果树的扇形统计图