如图所示，一个足球静止在水平地面上，请画出它受力的示意图

    Hi, boys and girls!  ____ （感谢）for your pictures. ____  (在这里)is a photo of my____ （家庭）.This is my grandfather ,Barry. ____  (那个)is my grandmother, Linda. She is 70.Look!What____ (颜色)is her jacket? Oh, it's red. These are my____（父母）.This is my____ (母亲),Jane and this is my father, Henry. And this is my ____ （叔叔）,Paul. He's my father's brother. The girl is my____（堂妹）, Lisa. Look at the boy. He is sad. He ____ (丢失)his books. He is my brother.

第三周期元素R，它的原子最外电子层达到稳定结构所所需的电子数少于次外层与最内层电子数之差，且等于最内层电子数的整数倍，关于R的叙述中正确的是（　　）

— _______is the population of Beijing?

— Over ten million, but I'm not sure.