题目

82.I was only when I reread this poems recently _____ I began to appreciate their beauty. A. until        B. that   C. then       D. so 答案：B分别将甲“220V 40W”、 乙“220V 60W”两只小灯泡接入电路中，若将它们并联接入220V的电路中时，        灯比较亮；若将它们串联接入220V电路中时，      灯比较亮。