小刚为书房购灯,有两种灯供选择:一种是11W(即0.011kW)的节能灯,售价为61.8元,另外一种是80W(即0.06kW)的白炽灯,售价为3元,两种灯的照明效果一样,使用寿命也相同,(3000H以上),电价为0.5元
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/31 00:59:43
![小刚为书房购灯,有两种灯供选择:一种是11W(即0.011kW)的节能灯,售价为61.8元,另外一种是80W(即0.06kW)的白炽灯,售价为3元,两种灯的照明效果一样,使用寿命也相同,(3000H以上),电价为0.5元](/uploads/image/z/4314464-8-4.jpg?t=%E5%B0%8F%E5%88%9A%E4%B8%BA%E4%B9%A6%E6%88%BF%E8%B4%AD%E7%81%AF%2C%E6%9C%89%E4%B8%A4%E7%A7%8D%E7%81%AF%E4%BE%9B%E9%80%89%E6%8B%A9%EF%BC%9A%E4%B8%80%E7%A7%8D%E6%98%AF11W%EF%BC%88%E5%8D%B30.011kW%EF%BC%89%E7%9A%84%E8%8A%82%E8%83%BD%E7%81%AF%2C%E5%94%AE%E4%BB%B7%E4%B8%BA61.8%E5%85%83%2C%E5%8F%A6%E5%A4%96%E4%B8%80%E7%A7%8D%E6%98%AF80W%EF%BC%88%E5%8D%B30.06kW%EF%BC%89%E7%9A%84%E7%99%BD%E7%82%BD%E7%81%AF%2C%E5%94%AE%E4%BB%B7%E4%B8%BA3%E5%85%83%2C%E4%B8%A4%E7%A7%8D%E7%81%AF%E7%9A%84%E7%85%A7%E6%98%8E%E6%95%88%E6%9E%9C%E4%B8%80%E6%A0%B7%2C%E4%BD%BF%E7%94%A8%E5%AF%BF%E5%91%BD%E4%B9%9F%E7%9B%B8%E5%90%8C%2C%EF%BC%883000H%E4%BB%A5%E4%B8%8A%EF%BC%89%2C%E7%94%B5%E4%BB%B7%E4%B8%BA0.5%E5%85%83)
xSn@ȌEY$X.jW"UݰtBy@JHR$1E?%0+~!gl:qywι{.d
OgG~Zth:=G8?刃,I47&C5myK"՟lpڔi?uOO*]b&;¼yg?yM6\~|H@sQMHJWMy"&^a2L"
}JVۀz;,doՂcESqq:-zS!խnq?hh=^#B{ g _Q}ylzX.yo`