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第7部分send vase carefuldrop of coursetake coffee flower some show behind tea cheese glad soap teapot askindeed homework favourite hammer make front listen hope bookcase pink chocolate paint tobacco brea
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第8部分steak orange butchertomato choice truth wine grape tell blackboard bean lamb chickencabbage lettuce husband potato minute apple sweet terrible jam want cake beer fresh biscuit like hall ripe beef
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一 循环过程热机 :持续地将热量转变为功的机器 工作物质(工质):热机中被利用来吸收热量并对外做功的物质 二 热机和致冷机致冷机:利用外界作功使热量由低温流入高温的机器 注意:当循环过程是P-T或V-T图时,可将其转换为P-V图进行判断正、逆循环例1 已知一定量的理想气体经历如图所示的循环过程。其中ab 和 cd 是等压过程, bc 和da 是绝热过程。已知 b 点温度 Tb = T1, c 点温
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