由同种材料制成的AB和BC两段导体,它们的长度相同,AB的横截面积比BC的小,将它们按照图3所示的方式串联在电路中,不计温度的影响,下列判断正确的是()
过去式短语 ____
—I have no idea ____________ tell her the bad news. —I think tomorrow is the best time.