题目

 (C)     It looks like a mobile phone（手机）, but the service is much cheaper. It acts like a mobile phone, but only in your own city. Beyond the city walls, it’s useless.     “Little Smart”, also called “xiaolingtong”, has always been compared to mobile phones. But actually, it is more like one of those cordless phones(无绳电话) used around the home. The only difference is that this one reaches much further than from the bathroom to the living room. It can travel across an entire city.      Cheap costs are the main reason for the success of Little Smart. It costs3．化学与生产、生活密切相关，下列说法正确的是（　　）A．用FeCl3对饮用水进行杀菌、消毒B．用电解氯化铝溶液的方法制取铝单质C．NH4F溶液储存于玻璃试剂瓶中D．加热并蒸干硫酸铜溶液可得到硫酸铜固体