A:蛋白质
B:糖类
C:脂肪
有一枚材质均匀的正方体骰子,它的六个面上分别有1点、2点、…6点的标记,掷一次骰子,向上的一面出现的点数是3的倍数的概率是____.
About _______ of the students in our class were born in the _______.