问题 解答题

随着人们经济收入的不断提高及汽车产业的快速发展,汽车已越来越多地进入普通家庭,成为居民消费新的增长点.据某市交通部门统计,2007年底全市汽车拥有量为150万辆,而截止到2009年底,全市的汽车拥有量已达216万辆.

(1)求2007年底至2009年底该市汽车拥有量的年平均增长率;

(2)为保护城市环境,缓解汽车拥堵状况,该市交通部门拟控制汽车总量,要求到2011年底全市汽车拥有量不超过231.96万辆;另据估计,从2010年初起,该市此后每年报废的汽车数量是上年底汽车拥有量的10%.假定每年新增汽车数量相同,请你计算出该市每年新增汽车数量最多不能超过多少万辆?

答案

解:(1)设该市汽车拥有量的年平均增长率为x. 根据题意,得150(1+x)2=216,

解得x1=0.2=20%,x2=﹣2.2(不合题意,舍去).

答:该市汽车拥有量的年平均增长率为20%.

(2)设全市每年新增汽车数量为y万辆,则2010年底全市的汽车拥有量为(216×90%+y)万辆,2011年底全市的汽车拥有量为[(216×90%+y)×90%+y]万辆.

根据题意得(216×90%+y)×90%+y≤231.96,

解得y≤30.

答:该市每年新增汽车数量最多不能超过30万辆.

阅读理解

阅读理解

     Nowadays everybody seems to think that they know English. Many people speak it but few speak it

really well. Practice is necessary in speaking English well.

      Reading is also one of the things that will help you to speak English better. Read whenever you can

and whatever you like! Read papers and Internet sites that you like in English every day. Then, you will

see that the number of known words is increasing and you are able to speak with more skills. Then you

will have made the foundations (基础) and a good basis of English. It is not good to stop and get stuck

there.

     Going to England or an English - speaking country is a good choice, but many people cannot afford it.

If you cannot go, reading and speaking with your friends will also help you to practice your English.

However, I think it is very good to visit some English - speaking country to see and test you knowledge

in everyday life. You will understand the everyday usage of the language in its natural environment. There

your level of English is going to improve even faster. You ability to speak English is better. Nothing can

match the excitement and happiness when a native speaker tells you that your English is very good!

     Finally, in order to speak English well, you must be persistent (坚持的) and do it every day. It is like

playing the piano. Pianists play it every day and so should you. Include English in your life and you will

see where it is going. Practice, practice! Read, write and improve your language skills and you are on

you way when you will be able to speak it with more and more confidence!

1. Which of the following would be the best title for the passage?

A. How to Improve Your Language Skills

B. How to Speak English Well

C. Speaking English

D. Practice, Practice!

2. What does the writer suggest about reading?

A. Trying to improve your vocabulary.

B. Keeping on reading when you have time.

C. Stopping when you have a good basis of English.

D. Looking up every unknown word when reading.

3. In the writer's eyes, the essential way to improve your speaking skills is _______.

A. practicing

B. going abroad

C. reading

D. writing

4. The main idea of the last paragraph is that ________.

A. we should play the piano every day

B. speaking English is fun and entertaining

C. we should practice English every day to improve our speaking skills

D. if we've learned to read and write, we'll certainly be able to speak

5. According to the passage, what may make the author excited?

A. Reading papers and Internet sites.

B. Having a good basis of English.

C. Going to an English - speaking country.

D. A native speaker's praise.

单项选择题