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【多选题】
陈大燮指出的工程热力学两大研究方向（），至今仍然是我国工程热力学领域的主要研究内容.
A.
工质热物性
B.
动力机械循环效率的提高
C.
蒸汽机原理
D.
蒸汽及内燃周程
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】按照热力学上通常的规定，下列反应中ΔrHm和生成物的ΔfHm相等的是…( )
A.
CaO(s)+CO2(g) →CaCO3
B.
6Li(s)+N2(g) →2Li3N(s)
C.
1/2H2(g)+1/2Br2(l) →HBr(g)
D.
2H2(g)+ O2(g)→2H2O(g)
【单选题】热力学中平衡态指______。
A.
系统宏观性质不随时间改变的状态
B.
没有外界作用时系统宏观性质不随时间改变的状态
C.
外界作用不变时，系统宏观性质不随时间改变的状态
D.
没有外界作用时的状态
【单选题】Many objects in daily use have clearly been influenced by science, but their form and function, their dimensions and appearance were determined by technologists, artisans, designers, inventors, and en...
A.
Mathematical thinking is essential to any design course.
B.
Nonverbal thinking has its advantage over other perceptive processes.
C.
Engineering design demands scientific thought.
D.
Artists play a primitive role in engineering design.