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![]() The Scientific Method Did you ever wonder why the water level in a glass doesn't change when the ice in the glass melts (融化)? To find out why, you can use the scientific method. Used by scientists in various situations, the scientific method is also a clear and logical way to solve many real-world problems, as the procedure below indicates.
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1. We all know the fact that . | ||||||||||||
A. the water level in a glass doesn't change when the ice in the glass melts B. the water level in a glass ![]() C. the water level in a glass rises when the ice in the glass melts D. the water level in a glass goes down when the ice in the glass melts | ||||||||||||
2. Which of the following is another good title for this passage? | ||||||||||||
A. Research and Conclusion B. Observation and Experiment C. Follow the Steps to Find Out Why D. Mix Water with Ice and Get the Result | ||||||||||||
3. A hypothesis is _______. | ||||||||||||
A. a guess about the cause of something B. the first step in the scientific method C. a conclusion about water molecules D. an experiment on ice and water | ||||||||||||
4. This passage suggests that _______. | ||||||||||||
A. repeated experiments lead to the right result B. research should be done in various situations C. your hypothesis can prove your experiment results D. a logical method is needed when solving problems | ||||||||||||
5. The chart in the passage is useful because it _______. | ||||||||||||
A. shows a diagram of how ice melts B. shows steps and examples C. compares water with ice D. explains cause and effect |
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Advertising is a form of communication that uses all kinds of media, and is visible everywhere these days. Typical customers of advertising companies are other companies, or businessmen, who want to persuade potential customers to buy more of what they make or sell. But there are other kinds of customers. Some organizations spend large sums of money on advertising a political party or other group that sells what is not, strictly speaking, a product or service. Such non - profit organizations are not typical advertising customers, and they prefer ways of spreading knowledge, changing attitudes, and improving society. Many advertisements are designed to increase sales of products and services by either improving brand image or, in the case of non - profit organizations, expressing ideas. In order to achieve th~s, advertisements will often pass on truthful information while delivering their messages. Every major medium is a means of delivering these messages, including television, radio, cinema, magazines, newspapers, video games, the Internet and billboards (大幅广告牌). Advertising will usually be created and. placed by an advertising agency on behalf of company or other organization. Spending on advertising has increased greatly in recent years. In 2006, spending was estimated at $155 billion in the United States and $385 billion worldwide; the latter is expected to reach more than $500 billion by 2010. While advertising can be seen as a necessity for economic growth and social development, it is not without social costs. Advertisement emails and other forms of junk mail have become so popular that ~they have become a major burden to users of I nternet email services, as well as a financial burden on Internet email service providers.
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