Gasoline (汽油) prices are getting higher and higher. The prices make it hard for drivers to afford the fuel.
One group held a special event to display（展示）new kinds of cars .
The new cars are different and they can run on many different kinds of fuels .
Some of these cars are called hybrids(混合动力). They can run on different kinds of fuels . One kind of them runs on a special fuel cell which is filled with a gas called hydrogen(氢气). ___1.___ They are very clean , and don’t give off bad fumes(烟雾) when they run .
The man who makes fuel cell cars is excited about the technology .__ 2.___ Once we use oil up , it will take millions of years for more oil to form. Since gasoline is made from oil , that could be a problem for companies that make traditional cars , and for drives . __3.__
Buses that run on hydrogen fuel cell power are being tested on the road . They could become a common form of transportation in the near future
A. The fuel cell cars are also better in another way . B. However, it won’t be a problem for cars that run on fuel cells .. C. He says we will never run out the fuel, but we may run out of oil. |
4.What do you think of this kind of new cars ? Why ?
用方框中所给的单词的适当形式填空，每次仅限一次。
destroy lovely allow nine French |
1.September is __________ month of a year.
2.I can read __________ but I can’t speak it well.
3.My house _________________ by the heavy rain last week.
4.I will help my mother do some washing if she ____________ me .
5.My little sister is as ____________ as an angel (天使).
One morning, Wu Liang discovered that her classroom had c__1.__. She found that desks were no longer in rows , but were p___2.__ together to make eight bigger desks . She was too excited about it for the first two days and she couldn’t listen to the teachers carefully. But soon she and her classmates got u___3._ to this new classroom arrangement . “Now our class is quieter.” said Wu .”What’s more , we can come up with our o_4._ ideas and learn more through discussions. It’s a better way to study .”
Li Yu liked it, too. He said ,”Group members first discuss , and then show the r_5.___ of our discussions in front of the whole class. It makes us believe in ourselves.” It was part of a reform(改革) at Li’s school . The school made this reform because they wanted to p___6.__students with easier ways to study and more c__7._) to discuss. “Our school hopes it can i__8.__ students’ abilities to study by themselves and work in groups .” said Zhang Ming , an English teacher .
However, the reform has demanded(要求) more for teachers . Now they have only 15 minutes to give the lesson which should be taught in 40 minutes before . It is difficult to teach well in s__9._ a short time . The teachers have to find b___10.__ ways to teach more effectively.
“The reform demands more, but I’m sure it is helpful.” Added Zhang Ming .
It may seem easy to say that plants and animals are different. Any child can tell the difference between a tree and a dog. But those differences are far deeper than just what they look like. The cells (细胞) that plants are made up of are different. In other words, the cell wall of plants has something special.
First of all, it's important to find that not all plant cells have a cell wall. Besides, there are many differences of a cell wall based on the kinds of plant. The following is meant to be what a plant cell wall is like.
The cell wall of a plant is on the outside of the cell membrane (膜). It is usually hard and cannot be bent easily, but the degree of flexibility (韧性) of the cell wall is different. It is based on the special use that the cell has in keeping the plant alive. Cells that make up the trunk of a tree are clearly less flexible than cells on a leaf.
Cell walls act in many ways. They serve to protect the plant. They provide support, as well as help in the movement of chemicals and wastes into and out of the cell. More importantly, they control the water that goes in and out. Plants must have good water controlling systems (系统), allowing them to keep water during dry seasons, and get rid of unnecessary water. Plants can't walk around to find water, so being able to control water is very important.
So there you have it , what a plant cell wall is. Of course, there are many other things that are not talked about here. Knowing more about plant cell wails requires further study and research.
1.From the first two paragraphs we can find that _____.
A. all plants have a ceil wall
B. plant cells and animal cells are the same
C. different kinds of plant have different cell walls
D. there are no differences between the cells of a tree and a dog
2.The underlined word "bent" in the passage is the closest in meaning to _____.
A. 变形的 B. 防水的 C. 太阳灼伤的 D. 表皮破损的
3.Cells in the trunk of a tree are _____ those on a leaf.
A. as flexible as B. not so flexible as
C. more important than D. less important than
4.What is the most important use of a plant cell wall?
A. To protect the plant. B. To provide support.
C. To move chemicals and wastes. D. To control the water.
Clothing is a language. It tells us about individual people: their personality, their age, their place in society and so on. If we want to know more about society, we can look at traditional clothing.
The continent of Africa has a long history and a rich culture, and this is shown in traditional dress. You often find three colours — red, gold and green in the clothing. The first colour stands for the blood of millions of people who suffered as slaves(奴隶); the second is for the rich resources of the African earth; and the third represents the grasslands of home.
The patterns(图案) on the clothing also have a meaning. A common pattern is in the form of a cross “×”, which stands for “unity”. Another pattern is a rectangular box, which represents “strength”.
Because clothing has a strong social meaning, people are very careful in choosing what to wear. It would be a serious mistake to wear the wrong clothing, or to wear clothes in the wrong way. For instance, in Ghana, a woman should wear her waistband differently according to the importance of the social event.
Traditional dress also tells us about everyday life. African designs are famous for loose(宽松的) clothing. The climate, with the hot sun and wide temperature ranges(变化), requires that the clothes are comfortable for daily life.
Although many people wear western clothes, particularly in the big cities in Africa, traditional dress is very highly valued(评价). This is because it has deep cultural meanings.
1.According to the passage, red ________.
A. represents the setting sun
B. stands for African unity
C. is chosen because it is a bright colour
D. is a reminder(暗示) of the sad history in Africa
2.Traditional dress should also be practical(实用) because ________.
A. it has deep cultural meanings
B. people wear it in the big cities
C. it needs to protect people from the climate
D. it needs to keep people dry in the rainy season
3.According to the passage, which sentence is NOT RIGHT?
A. African dress has deep cultural meanings.
B. Africa has a long history and a rich culture.
C. The rectangular box in the pattern represents “strength”.
D. People in the big cities in Africa prefer to wear western clothes.
4.The passage is mainly about ________ in Africa.
A. the history of clothes
B. modern fashion styles
C. the meanings of traditional dress
D. the materials used in traditional dress
If you want to find out a piece of information about anything , the best place to search for it is Wikipedia（维基百科）. This online encyclopedia is written by thousands of people around the world. Anyone can add or change the information if he or she finds it not correct or not well written. In this way, people who know a lot about a certain subject can write about it even if they are not university professors.
What is more, Wikipedia includes articles written in about 235 languages. This fact makes it one of the few websites (网站)on the internet that are truly international. It was started in 2001 by Larry Sanger and Jimmy Wales, as a free online English-language encyclopedia project. By April 2008, over 10 million articles had been put on Wikipedia. A quarter of the articles are in English. Wikipedia is also a place where people can find the latest news.
However, Wikipedia has its own problems. There have been many complaints that some of the information on Wikipedia is not accurate（准确的）and some important subjects are not included. This has led to arguments between the writers of articles. The people running Wikipedia say that the accuracy of the information is improving and that it is one of the top 20 visited websites on the internet.
So, if you are looking for some information, why not try Wikipedia?
1.Wikipedia is ___________.
A. a computer game B. an online magazine
C. a free university D. a website encyclopedia
2. People who write on Wikipedia__________.
A. know much about a certain subject
B. likes writing different stories
C. should be university professors
D. are usually famous scientists
3.Wikipedia is truly international because_________.
A. everything is written in English
B. the articles are in about 235 language
C. there are over 10 million articles
D. each writer can write in Various languages
4.Besides information about different subjects, people can also__________ on Wikipedia.
A. watch interesting movies B. send e-mail to friends
C. read about the latest news D. play exciting games
