题目内容

最有利用价值的相变潜热是

A. 固体物质的晶体结构发生变化
B. 固、液相间的相变即熔解、凝固
C. 固相直接变成气相即升华
D. 液、气相的相变即气化、冷凝

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更多问题

下列能源中品相最高的是

A. 电能
B. 机械能
C. 太阳能
D. 热能

下列函数哪种不属于状态函数

A. 压力
B. 时间
C. 体积
D. 焓

What a lovely party! It's worth ______all my life.(2002.6.CET-4)

A. to be remembered
B. being remembered
C. to remember
D. remembering

Peter,who had been driving all day,suggested ______at the next town.(2000.6.CET-4)

A. to stop
B. stopping
C. stop
D. having stopped

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