2013年12月4日下午，工业和信息化部正式发放4G牌照，宣告我国通信行业进入4G时代．4G时代的到来，将使我们可以使用4G手机随时随地进行无线网络登录．对于手机无线上网，下列说法正确的是（　　）

生活中下列做法正确的是

    There're five members in my family—my parents , my grandparents, and me . My mother is a teacher. She teaches Chinese in our school. She likes music. My father is a teacher, too. He teaches art in the Guang Ming primary school. He likes going hiking. My grandmother is a worker. She likes reading books. My grandfather is a scientist. He likes playing chess. I am Betty. I'm in Shi Yan primary school. I like singing and dancing. Look! I have a happy big family. Isn't it?