问题
填空题
白炽灯上标有“220V 40W”字样，其额定功率为 瓦，工作时是将 能转化为光能和其他形式的能。若该灯正常工作10小时，需用电 千瓦时。
答案
（16）40； （17）电； （18）0.4。
白炽灯上标有“220V 40W”字样，其额定功率为40瓦，工作时是将电能转化为光能和其他形式的能。若该灯正常工作10小时，需用电0.4千瓦时。
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白炽灯上标有“220V 40W”字样，其额定功率为 瓦，工作时是将 能转化为光能和其他形式的能。若该灯正常工作10小时，需用电 千瓦时。
（16）40； （17）电； （18）0.4。
白炽灯上标有“220V 40W”字样，其额定功率为40瓦，工作时是将电能转化为光能和其他形式的能。若该灯正常工作10小时，需用电0.4千瓦时。
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