《马关条约》签订的消息传入中国后，国人在某一茶馆中谈论，其中不正确的是（    ）

注意：行文连贯，涵盖要点，适当发挥。词数100左右。
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如图甲是某同学家的水族箱，箱内盛水40L，为了让热带鱼有一个舒适的生活环境，箱内装有一个“220V 200W”的电加热棒给水加热，当水温升到设定值时加热棒便自动停止工作，待水温自然冷却到一定温度后再次加热，使箱内水温稳定在一定范围之内，水温随时间变化图象如图乙所示．【C_水=4.2×10³J/（kg•℃）】求；