题目内容

To play together and win as a team, each player had to care .

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So a company needs discipline, and above all it needs to develop that Lombaridi talked about.

This can be done through company functions and motivational events which enable staff to spend time together, with each other, and care for one another.

工作在100℃和25℃的两个大热源的卡诺热机效率η为

A. 20%
B. 25%
C. 50%
D. 75%

若热机的低温热源是空气，平均温度设为293K，为提高热机的效率，只有尽可能提高高温热源的温度。如果希望可逆热机的效率达到60%，试计算这时高温热源的温度为（）

A. 473 K
B. 673 K
C. 732.5 K
D. 273K