题目

小华想利用电流表和阻值已知的电阻R0测量电阻Rx的电阻值。他选择了满足实验要求的电源、电流表，并连接了部分实验电路，如图所示。 （1）请你添加两根导线帮助小华完成实验电路的连接。 （2）当开关S1闭合、S2断开时，电流表的示数为I1，当开关S1、S2均闭合时，电流表的示数为I2，请用I1、I2和R0表示RX。RX＝________。二、单词拼写【1】【1】The small player_______（得分）two goals before half-time yesterday.【2】【2】As long as you are happy, it doesn't_______（要紧）what you will do.【3】【3】I didn't_______（逗留）long in the city.【4】【4】The rose is the_______（国家的）flower of England.【5】【5】Although he was very angry, he_______（强迫）a smile.【6】【6】Life is a_______（旅行），not a destination.