题目

 It can’t be denied that Diaoyu Islands are _______ part of China and what some Japanese have done recently is actually an offence against _______ Chinese people.    A. a; /            B. a; the      C. the; /        D. / ; the 答案：D伏安法测小灯泡的电阻，(1)设计电路图，并按所设计电路将实物连接起来，(设被测电阻约50Ω左右)(2)连接电路时，开关K应________，滑动变阻器滑片P应放在________．(3)若电压表、电流表如图，则U＝________，I＝________，＝________．