每日一笑081028? Two Hermits Two hermits lived in a cave far from civilization. One day a little dog ran past the entrance to the cave. Six months later one hermit said to the other one, "That was a cute little black dog." One year later the other hermit said, "It wasn't a black dog; it was a white one."Eight months later the first hermit jumped up and exclaimed, "If we're going to have this constant bickering, I'm leaving. [ ]查看更多6个回答 . 2人已关注
2013年下午案例12? 7、 一个连续操作的单效 蒸发器 ,使用120℃的饱和蒸汽1550kg/h(冷凝水在饱和温度下排放)每小时将温度为40℃的2000kg的水溶液从质量分数0.1浓缩到0.3,溶液的评价比热容为3.77KJ/Kg.K(忽略稀释热),蒸发器的操作压力为40KPa(A),在改压力下溶液的沸点为80℃,已知80℃、120℃下水的汽化热分别为2308KJ/Kg 2206 KJ/Kg 问该蒸发器的热损失量(KJ/s)是下列哪一个数值? A 10.78 B 38.82 C 55.13 D 72.34 请问我错在哪里?谢谢! 查看更多4个回答 . 5人已关注