题目

________ is known to us all is that the famous author, for ________ life was hard in the past, still works very hard in his eighties. A．What; whom  B．As; whom  C．It; whose  D．What; whose   答案：A  甲灯标有“220 V　60 W”、乙灯标有“220 V　100 W”字样，如果两灯泡钨丝长短一样，则钨丝较粗的是_________灯，如果将两灯串联在220 V的电源上，使用相同时间，甲、乙两灯消耗的电能之比是__________。