一、饮水机【例1】(辽宁·沈阳)“节能减排,开关未来”的活动已普及到家家户户,它倡导合理开关家用电器来节约能源。由此,小明想到父母经常为夜间是否要关闭饮水机而发生争执:母亲认为应该关机,理由是饮水机在夜间无人饮水时仍在对热水包里的水间歇性加热,白白消耗电能。父亲则认为不该关机,因为第二天重新开机为凉水加热会消耗更多的电能。为 First, drinking fountains [Example 1] (Liaoning Shenyang) “energy saving, switching future ” activities have spread to every household, it advocates a reasonable switch appliances to save energy. As a result, Xiao Ming thought parents often had to dispute whether to turn off the water dispenser at night: the mother thought it should be shut down on the grounds that the water dispenser was still intermittently heating the water in the water bag when no one was drinking at night, consuming electricity in vain. My father thinks it should not be shut down, because the next day to restart the cold water heating will consume more energy. for