- 搜标题
- 搜题干
- 搜选项
单项选择题
A steam turbine operates at a boiler temperature of 450 K and an exhaust temperature of 300 K. What is the maximum theoretical efficiency of this system? ()
A．0.240
B．0.500
C．0.333
D．0.667
E．0.150
B．0.500
C．0.333
D．0.667
E．0.150
