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Water is important for pupils to study, not only because it is so abundant, covering three times as much of the earth’s surface as land does. It is the most common substance in living plant and animal tissues; without it, most other chemicals needed for life could not get into or out of cells. Its floatability makes it possible to move people and cargoes by ship--without which early exploration and commerce would have been impossible. Hydroelectric(水电) stations are and will continue to be a major source of electrical energy. Water is also important for sanitation (卫生) and recreation.Early experiences with liquids should include those dealing with floatability, change of state, and surface films. Children should investigate under what conditions objects sink or float, both in water and in other liquids. They should watch ice melt, and water freeze, and evaporate. They should also observe other substances that change state easily, such as candle wax and butter. And they should observe the wide range of chemicals that dissolve in water.In their investigations, pupils should become aware of the ease with which certain liquids evaporate and of the danger of strong-smelling substances such as those from cleaning fluids and gasoline. They should experience the pleasure of playing in and around water, but they should also be made aware of the hazards(危险) and be taught to play safely.Pupils must learn of society’s increasing demands upon fresh water and develop a healthy concern for how it is used. The amount of water on earth does not change; it is only recycled. What is used for pupils today is part of the same water used even by Columbus and Cleopatra!Finally, pupils should come to appreciate the different kinds of methods by which fresh water is transported from the sea to land areas. They should know the potential(潜力) of the sea--for all practical purposes, the last frontier on earth--for additional fresh water, for food, and for chemicals. They also should understand the importance of the sea for transportation and recreation, as well as for its effect on weather. Which of the following can help children have the experiences dealing with the floatability of liquids（）
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Water is important for pupils to study, not only because it is so abundant, covering three times as much of the earth’s surface as land does. It is the most common substance in living plant and animal tissues; without it, most other chemicals needed for life could not get into or out of cells. Its floatability makes it possible to move people and cargoes by ship--without which early exploration and commerce would have been impossible. Hydroelectric(水电) stations are and will continue to be a major source of electrical energy. Water is also important for sanitation (卫生) and recreation.Early experiences with liquids should include those dealing with floatability, change of state, and surface films. Children should investigate under what conditions objects sink or float, both in water and in other liquids. They should watch ice melt, and water freeze, and evaporate. They should also observe other substances that change state easily, such as candle wax and butter. And they should observe the wide range of chemicals that dissolve in water.In their investigations, pupils should become aware of the ease with which certain liquids evaporate and of the danger of strong-smelling substances such as those from cleaning fluids and gasoline. They should experience the pleasure of playing in and around water, but they should also be made aware of the hazards(危险) and be taught to play safely.Pupils must learn of society’s increasing demands upon fresh water and develop a healthy concern for how it is used. The amount of water on earth does not change; it is only recycled. What is used for pupils today is part of the same water used even by Columbus and Cleopatra!Finally, pupils should come to appreciate the different kinds of methods by which fresh water is transported from the sea to land areas. They should know the potential(潜力) of the sea--for all practical purposes, the last frontier on earth--for additional fresh water, for food, and for chemicals. They also should understand the importance of the sea for transportation and recreation, as well as for its effect on weather. It can be inferred from the passage that（）
以下所列非甾体抗炎药中，偶可导致无菌性脑膜炎的是
M: Sally, were you able to get that report all typed up.W: Not yet, Mr. Black. Mrs. Famsworth asked me to type some letters for her. I’ll be finished pretty quick and then I’ll start on that.M: Don’t forget I need it in the morning. I have to take it along to Chicago to the regional meeting.W: Don’t worry, I’ll get it done. My husband’s on a business trip too. He’s in Detroit today, and tomorrow he’ll be in Boston. So I’m planning to stay late. After it’s typed up I’ll leave it on your desk. I should be finished by 8:00.M: I’m sorry to make you so late.W: It’s all right, Mr. Black. Really, I don’t mind at all. Besides, I can make a little extra money. My husband’s birthday is next month. I want to buy him a new watch.M: What kind are you going to get for him, a BulovaW: No, I thought I’d get a Rolex. or an Elgin. I don’t really know much about watches.M: I’ve got one of those Seiko digitals. I really like it.W: Do you think my husband would like one like thatM: I’m sure he would. The only problem is that they’re a little bit heavy.W: If they’re that good, I think I’ll go ahead and get him one.M: Well, at least he won’t get a tie. That’s what I usually get.W: Remember, it’s the thought that counts. What kind of watch is Sally going to buy（）
Directions: In this part you will read a selection of texts, such as magazine and newspaper articles, letters, and advertisements. Each text is follwed by several questions. Select the best answer for each question and mark the letter (A), (B), (C), or (D) on your answer sheet.Questions 153-156 refer to the following memo. Memorandum To: Juan Gomez From: Maria Johnson, Building Engineer Date: 17 Jan. 20__ Re: Thermostat located in your office It has come to our attention that the thermostat located in your office is frequently being turned off. Please be aware that although this thermostat is located in your office, it actually controls the temperature on the entire second floor. When it is turned off, it affects not only your office, but all the surrounding offices as well. We ask that you not touch the thermostat. The other second floor tenants are complaining about the lack of heat in their offices. If you wish to adjust the temperature in your office at any time, please speak with me or with one of my assistants. We would be happy to help you create an environment that is comfortable for you and your office staff, but please remember that we need to consider the comfort of everyone in the building. Thank you for your cooperation. The word "adjust" in paragraph 2, line 1 is closest in meaning to
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