摘要:Are those your pictures? Yes, . A.they’re B.they are C.those are D.it is

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The nose is important for everyone. It can help a person breathe and smell. In fact,it can also be used in many popular expressions.

      Some people can lead other people by the nose. For example, if a wife leads her husband by the nose, she can ask him to do whatever she wants him to do.

      Some people are said to be hard--nosed. They will not change their opinions of anything.

      If some people keep their noses out of other people’s business, they do not interfere

(     ) in anything that has nothing to do with them. The opposite kind of people are those who nose around all the time. They are interested in other people’s personal life.

      If someone works hard, he can keep his nose clean or stay out of trouble. How ever, more problems will be caused if a person looks down his nose at others or some things. He thinks they are unimportant. This kind of person might also turn up his nose at anything that he doesn’t consider good enough. He thinks he is better than anyone else.

      At school, some students thumb their noses at their teacher. They refuse to follow what their teacher says or do any work. Of course, it is not right for students to do like this.

    根据材料内容,从下面方框中选出恰当的短语完成下面五个小题,使句子通顺、意思完整。每个短语限用一次。

A. be hard—nosed     B. nose around     C. keep his nose clean

            D. turns up his nose     E. thumb their noses

1. I don’t want to make friends with David because he always       

2. Maggie likes to talk about others and      

3.My brother used to        , but now he can listen to others’ advice.

4. Bob and Andy usually        at their parents.

5.Michael works hard all the time, so he can        

 

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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.
小题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
小题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
小题3:Cells in the trunk of a tree are _____ those on a leaf.
A.as flexible asB.not so flexible as
C.more important thanD.less important than
小题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.
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