题目

     Visiting London can be an expensive trip, so establishing a budget and finding bargains when you arrive will help you get around London on the cheap． The following steps can help you find cheaper alternatives for transport for your London trip． l         Familiarize yourself with the city’s boroughs and specifically the area where you will be staying． You can use a street map, or an online map search engine, to establish where in the city you will be staying and the distance you are from the major tourist attractions you want to visit． l         Fin引起电线中的电流超过规定值的原因，可能是电线连接用电器总功率过大，也可能发生了____。避免电流超过电线规定值引起火灾的一种好方法，是在电路中串接______。