单选题提高循环热效率的途径是:()低温热源的温度,()高温热源的温度。A提高/提高B提高/降低C降低/提高D降低/降低
单选题
提高循环热效率的途径是:()低温热源的温度,()高温热源的温度。
A
提高/提高
B
提高/降低
C
降低/提高
D
降低/降低
参考解析
解析:
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