D

　　When water is heated until it boils， bubbles of gas appear and rise through the hot liquid. When an electric current passes through water in a process called electrolysis (電解)， bubbles of gas appear and rise through the liquid. Superficially (表面地)， the two events appear same.

　　If the gas from the boiling water is examined， its properties are found to be the same as those of the water， Thus， if the steam is cooled to room temperature， a liquid is formed which is indistinguishable from the original water. When， however， the gas from the electrolysis equipment is cooled to room temperature， it remains a gas rather than becoming a liquid. Nor will it， at zero degrees centigrade or below， turn to solid， as will the gas from boiling water， These two processes， boiling and electrolysis， have clearly resulted in products with quite different properties.

　　In boiling， the gas does not represent a new substance， but only a different state of the original substance. Electrolysis， on the other hand， has generated a product which is a new substance， or possibly a mixture of new substances. A change in state as represented by going from a liquid to a gas without the production of new substances in called a “physical change”。 However， when a process takes place that produces new substances， this is called a “chemical change” or a “chemical reaction”。 In a chemical reaction， the initial substances are replaced by a new set of substances or products.

　　( )63. Which of the following is the best title for this passage?

　　A. Electrolysis B. Physical and Chemical Changes

　　C. Different Types of Water D. Water Temperatures

　　( )64. At a temperature slightly above zero degrees centigrade， which of the following is true of gas produced by electrolysis?

　　A. It does not become liquid. B. It cannot be distinguished from water.

　　C. It becomes a solid. D. It expands greatly.

　　( )65. The passage is developed in the way of ________.

　　A. argumentation B. narration

　　C. comparison D. listing examples

　　五、补全对话(共5句;每句满分为3分，共15分。)

　　根据中文提示，将对话中缺少的内容写在线上。这些句子必须符合英语表达习惯，打句号的地方，用陈述句;打问号的地方，用疑问句。

　　提示：Wilson太太的丈夫生病了，发烧，头疼德厉害。她打电话给格林医生，请他们到家里来一趟。格林医生简单询问情况后，答应马上就到。

　　Mr. Wilson：Hello， this is Alice. Is Dr. Green there?

　　Dr. Green ：Yes， _________66________.

　　Mr. Wilson：Dr. Green， sorry to call you up at this time of the day. But my husband is very sick. I am rather worried. _________67_________?

　　Dr. Green ：Yes， certainly. _________68_________? It will help me to decide what to prepare before I come.

　　Mr. Wilson：Well， I can‘t tell exactly， but _________69_________.

　　Dr. Green ：All right then. Don‘t worry. Keep him in bed. _________70_________.

　　Mr. Wilson：I‘ll do that， Dr. Green. See you soon.

　　Dr. Green ：See you.

　　六、书面表达(共30分)

　　提示：请根据以下平面图写一篇短文向人介绍你们学校。

　　注意：(1)要包括图中所有内容，且叙述要连贯;

　　(2)词数为100左右。

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