[单项选择]我们想要了解历代皇帝和大臣人际互动的特点，一般选择什么研究方法（）？
A. 实验法
B. 访谈
C. 档案研究法
D. 参与观察法

When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust. It is only a small planet, and travels around the sun. The sun together with its planets, travels in the Milky Way(银河), our galaxy(星系). The Milky Way has about thirty billion stars like our sun, and is one of about a hundred million galaxies in the universe. Because the space (空间)is so great, it is difficult to work out how far away a star is. Instead of kilometres, we have light-years. A light-year means how far light travels in one year. Our nearest neighbour galaxy is more than 9000,000 light-years away from the earth.

Consumer satisfaction/dissatisfaction is determined by the overall feelings or attitude a person has about a product after it has been purchased. Consumers are engaged in a constant process of evaluating the things they buy as these products are integrated into their daily consumption activities.
What do consumers look for in products They want quality and value. Especially because of foreign competition, claims of product quality have become crucial to maintaining a competitive advantage. Consumers use a number of cues to infer quality, including brand name, price, and even their estimates of how much money has been put into a new product’s advertisement campaign, These cues and others, such as product warranties(保单) and follow-up letters from the company, are often used by consumers to relieve noticed risk and assure themselves that they have made smart purchase decisions.
{{B}} Consumer Satisfaction/Dissatisfa