题目

    India now leads the world in smartphone growth. It saw a 55% increase in the number of smartphones in 2014. The number of Web users increased by 37%. Smartphones were the source of 65 % of its Internet traffic and 41 % of its e-commerce, according to a report by the analyst Mary Meeker, titled “Internet Trends 2015”. India’s Internet boom has started. Within three or four years, almost every adult in India will own a smartphone. They will be used to order goods, read news, monitor crop growth and so on. Indian adults will be very interested in these devices just as young A28、小明设计了如图所示电路探究电热与电阻的关系，在A、B两个相同的烧瓶内分别装有质量和初温都相同的煤油，将选择好的铜丝和镍铬合金丝（铜丝电阻小于镍铬合金丝的电阻）浸没在煤油中，用两支温度计分别测量两瓶中煤油的温度．（1）实验时，将铜丝和镍铬合金丝串连接入电路中，这是为了控制电流和通电时间相同．（2）绐图中的装置通电一段时间后，观察到B（A/B）瓶里的煤油温度升高得较快．