科学实验

随着绿色环保理念越来越深入人心，使“低碳生活”越来越成为一种时尚，并由此带动低碳产业的发展，这表明                                。

阅读理解。

     I'm taking my family to other countries to have a trip. My wife, I and our two children are all

going along. My elder brother has decided to go with us. He has never been overseas (出国) and

he is even more excited than the children. My father is so old that he'd like to stay at home and

take care of the house.

     We're going to go by train to New York, and then take a ship to Europe (欧洲). When we arrive

in Europe, we're going to several countries for sightseeing. We'll go to places either by train

or by bus. We're going to fly home.

      It took us a long time to decide where to go, but I think we have planned a very interesting

trip. We will go to England, France and Italy. My wife is very interested in France because she is

a teacher of French. And my brother, who speaks very good Italian (意大利语), is looking forward

(期望) to the trip to Italy.

     We also talked about how we would go to Europe. At first we wanted to fly because it would

be faster and would save more time. But my brother likes to take a boat trip and the children enjoy

that, too.

1. My brother is very excited because______. 

A. he has many friends in other countries

B. he has never travelled by plane

C. he wants to buy some books in Italy

D. he has never been overseas

2. We're coming back home by______.  

A. sea   

B. air    

C. bus    

D. train

3. In Europe, we will ______  

A. go sightseeing at the seaside(海边)

B. go to different countries by ship

C. buy a lot of presents

D. go from place to place by train or by bus

4. My wife works in a______.

A. hospital    

B. factory   

C. shop    

D. school

5. My brother and my children would like to______.   

A. do some shopping in Europe

B. study the Italian language in Italy

C. enjoy a trip by ship

D. learn French in France

反比例函数的图象经过点P（-2，1），则这个函数的图象位于第（    ）象限．

简述非线编的特点。

下列度量单位中，用来度量计算机网络数据传输速度(比特率)的是______。

A) MB/s
B) MIPS
C) GHz
D) Mbit/s