问题 问答题 简答题

说明间歇式活性污泥法的运行特点。

答案

参考答案:

特点:①工艺简单,可省略二沉池和污泥回流设备。②反应推动力大,效率高。③沉淀效果好,管理得好时,处理水质优于连续式。④不易发生污泥膨胀。⑤通过运行方式调节(前加缺氧,厌氧时间)可脱N除P。⑥便于自动控制。⑦适用于中小型污水处理装置。⑧一般情况下,无需调节池。⑨采用集有机污染物降解和混合液沉淀于一体得反应器,间歇曝气曝气池。⑩曝气池容积小于连续式,建设费用与运行费用都较低。

阅读理解

阅读理解。

    ① The Dream It is everyone's dream to work at home or not work at all. You can plan your own hours

and work when you want to. There is no more rush hour and no hours that people waste when they get to

and from a job every day.

    ② The Fact The fact is that this dream can be attained. You can stay at home, work when you want to

and make money when you need to. There are plenty of opportunities for you to make money at home, just

by using your computer and the Internet.

    ③ Start Today! Educate yourself, look closely into all the opportunities and decide on what works best

for you. It will not happen during one night, but you can make the decision today and start to make it happen

today.

    ④ How Could You Do It? Do you have a blog (博客) or a personal website like millions of other people?

Are you using it to make money? Most of these blogs and website owners are not. But you can do that!

    ⑤ _____ When you have your computer and the Internet working for you, your businesses will be working

for you 24 hours a day, seven days a week. You will make money while you sleep, travel or do whatever you

want to do all day long.

    ⑥ Get Going! There are many ways you can make money with your computer. And you can begin your

Stay-at-home businesses with just a little money. What are you waiting for?

1. In which part of a newspaper would you most probably read this passage? [ ]

A. Sports

B. News

C. Business

D. Foreign

2. What does the underlined word "attained" in Point ② mean? [ ]

A. Broken

B. Realized (实现)

C. Lost

D. Destroyed

3. What's the best title for Point ⑤? [ ]

A. Sleep 24 Hours a Day

B. Make Money Every Moment

C. Play All Day Long

D. Travel Around the World

4. Which of the following is NOT TRUE according to the passage? [ ]

A. People can plan their own time when they work at home.

B. People can even use their blogs to make money.

C. People need a lot of money to start a stay-at-home business.

D. People can make the best decision and start to make it happen today.

5. How is the passage organized? [ ]

A. By showing a topic and giving solutions.

B. By giving reasons only.

C. By using famous people's words.

D. By telling old stories.

单项选择题