\What have revolutionized the music industry by creating high-quality, low-cost recording technologies and digital distribution?
A. Digital technologies
B. Live music
C. Streaming services
D. More and more audiences
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What may be the general rule to talk about Matters of the Heart?
A. Straightforward
B. Pour your hearts out
C. Ask about someone’s love life, marriage and family before you have a friendship with someone
D. Not too personal, not too fast
What has emerged with programs for entertainment, shopping and healthcare? ( )
A. VR/ AR
B. Publishing
C. Music
D. Film
有两个可逆热机，热机1在800K与400K的两热源间工作，热机2在 600K与200K的两热源间工作，则两热机的工作效率η1与η2：
A. η1＜η2
B. 相等
C. η1＞η2
D. 无法比较大小
对于克劳修斯不等式，下列解释正确的是：
A. 可逆过程的熵变，大于不可逆过程的熵变
B. 可逆过程的熵变，大于不可逆过程的热温商
C. 只有可逆过程有熵变，不可逆过程无熵变
D. 不可逆过程的熵变无法计算
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