一个等腰三角形底和高的比是8：3，把它沿底边上的高剪开，拼成一个长方形，这个长方

为慈善活动和广泛的助人活动的兴起奠定了思想基础的是（）。

A.自由思想

B.人道主义

C.社会福利观念

D.为公众服务的观念

《建设工程质量管理条例》规定，在正常使用条件下，建设工程的屋面防水工程最低保修期限是（)年。

A．1

B．2

C．3

D．5

4.3与2.6的积除以2.15，所得的商比10少多少？

普通工商企业可以成为同业拆借市场的主体。( )

If English means endless new words，difficult gramrnar and sometimes strange pronunciation，you are wrong．Haven’t you noticed that you have become smarter since you started to learn a language?

According to a new study by a British university，learning a second language can lead to an increase in your brain power，Researchers found that learning other languages changes grey matter．This is the area of the brain which processes information．It is similar to the way that exercise builds muscles．

The study also found the effect is greater，the younger people learn a second language.

A team led by Dr Andrea Mechelli，from University College London，took a group of Britons who only spoke English．They were compared with a goup of “early bilinguals．’’who had learnt a second language before the age of five，as well as a number of later learners．

Scans showed that grey matter density(密度)in the brain was greater in bilinguals than in people without a second language．But the longer a person waited before mastering a new language，the smaller the difference.

“Our findings suggest that the structure of the brain is changed by the experience of learning a second language，”said the scientists.

It means that the change itself increases the ability to learn．

Professor Dylan Vaughan Jones of the University of Wales has researched the link between bilingualism and maths skills. ‘‘Having two languages gives you two windows on the world and makes the brain more flexible，”he said．“You are actually going beyond language and have a better understanding of different ideas．”

The findings were matched in a study of native Italian speakers who had learned English as a second language between the ages of 2 and 34. Reading，writing，and comprehension were all tested．The results showed，that the younger they started to learn，the better．“Studying a language means you get an entrance to another world，’’explained the scientists．

小题1:The main subject talked about in this passage is         

A．language can help brain power

B．man's ability of learning a second language

C．science on learning a second language

D．language learning and maths study小题2:In the second paragraph，the writer mentions “exercise” in order to     

A．say language is also a kind of physical labor

B．make people believe language learning helps grey matter work well

C．show the importance of using the language when you learn the language

D．prove that one needs more practice when he(she)is learning a language小题3:The underlined word‘‘bilinguals”in Paragraph 4 probably means       

A．people who can speak two languages

B．second language learners

C．researchers on language learning

D．active language learners小题4:We may know from the scientific findings that        

A．the experience of learning a second language has bad effect on people’s brain

B．there is no difference between a later second language learner and one who doesn’t know a second language

C．the earlier you start to learn a second language，the higher the grey matter density is

D．the ability of learning a second language is changing all the time小题5:In the last two paragraphs，the author wants to tell us that      

A．learning a second language is the same as studying maths

B．Italian is the best choice for you as a second language

C．you’d better choose the ages between 2 and 34 to learn a second language

D．early learning of a second language helps you a great deal in studying other subjects