问题 问答题 简答题

什么是换气损失,它由哪些部分组成?并作图说明。

答案

参考答案:

换气损失就是理论循环换气功与实际循环换气功之差。换气损失由排气损失和进气损失两部分组成。

换气损失功=X+(Y+W)排气损失功Y+W进气损失功X泵气损失功(X+Y-d)

图中X,Y中间有一条水平虚线,曲线最右边有一条竖直虚线(也就是将W,d都封闭起来)

阅读理解

阅读理解

       What's your idea of a good time? What about dancing in a rainy field with one hundred and fifty

thousand other people? A famous rock band plays on a stage so far away that the performers look

very small.

       It may sound strange but that is what many hundreds of thousands of young people in the UK

do every summer. Why? Because summer is the time for outdoor music festivals.

       Held on a farm, the Glastonbury Festival is the most well-known and popular in the UK. It began

in 1970 and one thousand five hundred people took part in it, each paying £1- free milk from the

farm in the ticket. Since then more and more people came for the festival - in 2004 one hundred

and fifty thousand fans came, paying £112 for tickets to the three-day event. Tickets for the event

sold out in three hours. There were many superstars in it.

       Glastonbury is a charity event, donating millions of pounds to English and international charities.

1. When did the UK begin the Glastonbury Festival for the first time?

A. For 25 years.

B. In 1970.

C. Last summer

D. Since 2004.

2. Why is the festival held in summer?

A. Because it's a rainy season.

B. Because it's a season for indoor sports festival.

C. Because it's the best season in UK.

D. Because it's the good time for outdoor musical festival.

3. In Paragraph One, the word "performers" means "______" in Chinese.

A. 表演者

B. 风景

C. 观众

D. 雨滴

4. How many people came to enjoy the festival in 2004?

A. 1,500.

B. 105,000.

C. 115,000.

D. 150,000.

5. What do the UK have the Glastonbury Festival for?

A. To see many superstars.

B. To collect money for charities.  

C. For a rock band concert.

D. For free milk from the farm.  

名词解释