Now mobile phones become more and more popular. Should the middle school students be allowed （被允许）to use mobile phones? Different people have different ideas.

    John： My school is far away from my home. I only go home on weekends. So my parents bought me a mobile phone to keep in touch（联系） with me. It's convenient. I don't need to look for IC phones any more.

Mary： I think it's bad for us to use mobile phones in class. But after classes we can use them. We aren't kids any more， we know when and where to use it， so teachers and parents should believe us and let us use mobile phones.

Tony： I often send WeChat messages to my friends by mobile phone. It won't cost too much. It's a good way to talk with my friends when they are not with me.

    Andy： I think mobile phone is not only a tool for communication， but also a symbol of fashion. If you have no mobile phone， it means you are out of fashion. In other words， it's cool to have a mobile phone.

    Ted： We all know that it's convenient to have mobile phones. But many students often use them to play games or watch videos. It's bad for our study. I don't think it's necessary for students to have a mobile phone.

    Information Card

2015年11月25日，《山西关于加快推进电动汽车产业发展实施和推广应用意见》出台。

如图为某品牌电动汽车，其最大输出功率为90kW，最高车速为140km/h，续航里程为300km，如果以最大输出功率和最高车速运行140km，消耗电能为____kW•h．而作为城市出租，电动车百公里耗电约为30度，每度电价约为0.7元，燃油车百公里油耗约9L，目前油价约为8元/L，电动出租车每天行驶里程约为450km，每日节省____ 元。

读 “我国东部沿海某区域等高线地形图”，回答下列问题。