【单选题】绝热自由膨胀不是一个( ) (A) 内能不变的过程; (B) 熵增加过程; (C) 可逆过程; (D) 确定理想气体的内能仅是温度的函数的实验。
【简答题】由绝热材料包围的容器被隔板隔为两半,左边是理想气体,右边真空.如果把隔板撤去,气体将进行自由膨胀过程,达到平衡后气体的温度 (升高、降低或不变),且此过程是 过程 (可逆或不可逆)。
【单选题】According to the author, when a doctor tells a patient to 'return next Wednesday', the doctor is in effect ______.
A.
advising the patient to seek a second opinion
B.
admitting that the initial visit was ineffective
C.
instructing the patient to buy more medical services
D.
warning the patient that a hospital stay might be necessary
【单选题】理想气体经历了下列过程,其体积膨胀了三倍,其中有一个过程的熵变与其他三个不同,它是( )