问题 问答题 简答题

在烟气分析中如果CO与CO2含量都高说明什么?如何处理?

答案

参考答案:

说明火嘴风门供风不足,造成燃烧不完全,而炉体其它部位漏风严重,造成漏入空气量大,此时,应调节风门供风量,使其完全燃烧。同时加强炉体的堵塞,控制好炉膛负压,减少漏入空气量。

阅读理解

阅读理解。

      Should teenagers help their parents do chores? If you want to be an independent(独立的)one, or

you don't want your parents to be too tired, do chores at home.

     I have a classmate called Li Ting. She is the only child in her family. Her parents love her so much

that they don't let her do any chores.  On weekdays she gets up, has meals, goes to school, has lessons,

comes back home, does homework and goes to bed. While on weekends, she only plays with her friends. So she doesn't know how to do chores.  One day, her father was ill in hospital.  Her mother had to take

care of her father in the hospital and couldn't cook meals for her for a week.  Li Ting didn't know how to

cook meals.  She had a lot of trouble cooking meals and often felt hungry.  She only had instant noodles

for her meals.

1. How many children are there in Li Ting's family?

A. Two.    

B. Three    

C. One.    

D. Four.

2. The writer thinks it is______ for teenagers to learn to do chores. 

A. wrong    

B. important    

C. interesting    

D. boring

3. Li Ting doesn't______.

A. do chores on weekends    

B.  go to school on weekdays

C. do her homework on weekdays    

D.  have meals on weekends

4. Why did Li Ting only have instant noodles for her meals when her parents weren't at home? 

A. Because her parents didn't give her enough money.

B. Because she couldn't cook meals.

C. Because she liked eating instant noodles very much.

D. Because she didn't enjoy doing any chores.

5. Which of the following is NOT true? 

A. Li Ting's grandmother looked after her when her father was in hospital.

B. Li Ting couldn't do any chores.

C. Li Ting's parents love her very much.

D. Li Ting was often hungry when her father was in hospital.

单项选择题 A1/A2型题