如图是一种“闯红灯违规证据模拟器”的工作原理图，光控开关接收到红光时会自动闭合，压敏电阻若同时受到车的压力，其阻值变小，下列说法正确的是（　　）

亚里士多德说：“因为雅典宪法完全是寡头政治的，……所以在群众眼中，宪法上最残酷和苛虐的部分就是他们的奴隶地位；当然，他们对于每一件别的事也一样感到不满，因为他们觉得他们自己实际上什么事都没有参与。”这反映了雅典（    ）

    Dave Green is a 12-year-old boy. He lives in Shanghai with his grandparents, parents and sister Cindy. Dave likes blue best.Look,his jacket and backpack are blue.He is in Class 3.22 boys and 18 girls are in his class.His good friends Liu Kun and Li Jie are in Class 3,too.Miss Wang is their science teacher.She is a good teacher. Her classes are fun. They all like her a lot. Science is not difficult for them! Dave likes playing computer games,but he doesn't play them every day. He studies science every day.