题目

 The Internet and the effect______ brought about did a lot of good to our daily life and work.        A. that    B. what   C. which D. it 答案：D（2008?贵港）如图是分别测量电阻R1和R2的阻值时，得到的电流随电压变化的图象．若把电阻R1和R2并联接入电路中，通电后电阻R1和R2消耗的功率分别为P1和P2，则P1：P2（　　）A．小于1B．大于1C．等于1D．无法确定