问题
单项选择题
其它条件不变，提高蒸汽初温，循环效率提高的原因是（）
A、冷源损失数量减少
B、平均吸热温度提高
C、蒸汽湿度减少
D、蒸汽容积流量增加
答案
参考答案：B
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其它条件不变，提高蒸汽初温，循环效率提高的原因是（）
A、冷源损失数量减少
B、平均吸热温度提高
C、蒸汽湿度减少
D、蒸汽容积流量增加
参考答案：B
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| My name is Jane. My job is to write stories and newsletters for a magazine. I love traveling and hope to visit Great Britain one day. I'd like a pen pal from London, who is interested in discussing the differences between Europe and Asia. I love listening to pop music and playing football. I am Manuel. I'm a businessman and have a large company with many workers and clerks. I would like to find a pen pal who is also a businessman and lives in North America. I like using the Internet. I am working in a university. I speak English, French and Russian. My family name is Jackson but my students usually call me Sarah. I'd like a pen pal who is interested in language learning working in Oxford University. I don't like using computers for learning and I believe that true language learning can only happen in a classroom. I am Peter and interested in the differences between East Europe and North America. I love riding my horse Jackie and listening to jazz. I usually get up at 7 o'clock and go to school around 7:30 in the morning. I want to find a pen pal who has the same interest as me living in Sydney. Cindy is my first name. I am working in a travel agency. Sometimes I am called Mr Guide as I am working. I'd like to find a pen pal who comes from Europe. I like playing the piano and listening to jazz. I am interested in history, but I don't like discussing languages. | ||||||||||||||||||||||||
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