设x,y满足$\left\{\begin{array}{c}2x+y\ge 4\\ \stackrel{x-y\ge 1}{x-2y\le 2}\end{array}\right.$则z=x+y（   ）

    Computers are popular (受欢迎的) now. 1 can do many things on the computer. It is 2 for us to learn to use it. But some children 3 much time on computer games. That's 4 

    I have got a computer at home and I 5 it  with my parents. I often do my homework on it and when I'm 6 I listen to music on it. My 7 usually use the computer at weekends. What do they do 8 the computer? My father sees movies. My mother does 9 things. She does some shopping and talks with my grandparents on the Internet.

    Have you got 10  computer in your home?

Police: What's in your wallet?

Owner: There ______ some money and two tickets for today's e-sports competition.

下列四个选项中，平均速度最大的是（　　）