阅读理解。 It may em easy to say that plants and animals are different. Any c

题文

阅读理解。      It may em easy to say that plants and animals are different. Any child can tell the difference between  a tree and a dog. But tho 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 wail 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 bad 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 bad on the special u 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 wails act in many ways. They rve 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 asons, 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 cour, there are many other things that are not talked  about here. Knowing more about plant cell wails requires further study and rearch.1. The best title of the passage can be _____.    A. Different Plants                      B. Different Animals    C. The Plant Cell Wall                   D. The Us of Cells2. 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 dog3. The underlined word "bent" in the passage is the clost in meaning to _____.    A. shape-changed       B. water-kept        C. sun-burnt           D. skin-broken4. Cells in the trunk of a tree are _____ tho on a leaf.    A. as flexible as                           B. not so flexible as   C. more important than                     D. less important than5. What is the most important u 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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答案

1—5: C C D B D

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科教类阅读

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答题技巧：1. 加强整体意识，把握文章的主要内容。在阅读的时候可给段落标上序号，并给重要的句子和   关键词做上记号，尤其是各段中心句，为答题提供更快捷更多的信息源。 2. 审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。 3. 定位阅读，强化对应意识。同时要注意原文利用和自我加工相结合。