下图为各洲重要的山脉，根据图中信息，完成下列各题。

已知集合$A=\left\{x|\left|x\right|\le 2,x\in R\right\},B=\left\{x|\sqrt{x}\le 2,x\in Z\right\}$,则$A\cap B=$(  )

电脑键盘上的字母为何不按顺序排列？请你来做一项统计，下面是一篇小短文，根据短文中字母a，b出现的机会完成后面提出的问题：

Two Trips

Jack brought a small plane and began to fly it． He soon became excited and made his plane all kinds of tricks．

Jack had a friend，named Tom． One day Jack said to him，“I will pick you up in my plane．““I will be glad to．'answered Tom． They went up，and Jack flew around for half an hour and did all kinds of tricks in the air． Then they came down． Tom was to be back safely，and said to Jack，“Well，Jack，thank you very much for those two trips in your plane．“Jack was very surprised and asked，“Two trips？““Yes，my first and my last．'an﹣swered Tom．

根据上文填表

在日常生活中，我们每时每刻都会感受到政府的作用。下列选项中能体现政府管理人们社会生活的是（    ）

①派出所为林先生的儿子登记户口 ②新办企业领取营业执照

③中央电视台每天播报的天气预报 ④行人过马路要看红绿灯