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Read the article and select the best answer. Article: Computers have been used in teaching for more than twenty years. But a new book says that only now are they changing education. And it predicts that a lot more is about to happen. The book is called "Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns." "Disruptive Innovation" is a theory developed by lead author Clayton Christensen, a professor at the prefix = st1 /HarvardBusinessSchool. He says organizations almost always use new, creative technology only to continue what they already do. New technology should change organizations, he says, and disrupt them in a good way. They should use the technology to do things differently--for example, to serve more needs. The book says the needed disruptive force in education is computer-based learning. Michael Horn, another author of "Disrupting Class", told us about a Bostonpublic that he visited. Every student at Lilla G. Frederick Middle School inDorchester,Massachusetts, has a laptop computer. One class was learning about storms. Michael Horn says the laptops made it possible to truly individualize the lessons, to divide materials by ability level and learning style. At the end of the class, the students all took part in a discussion led by the teacher. Computer-based learning offers a way for students to take advanced courses not offered at their school, or to retake classes they failed. It also serves those who cannot physically attend school, and students who receive home schooling. Computer-based learning includes online courses. Enrollments in online courses have grown sharply. In 2007, the United Stateshad about one million enrollments, not including college courses. Students could be enrolled in more than one course, through schools or education companies. High school students make up about seventy percent of the enrollment. Still, nationally, only about one percent of all high school courses last year were taught online. But the authors of "Disrupting Class"predict it will be ten percent in about six years. And their research... Question: The passage is mainly about_. Options: A: a new book B: a new learning way C: some American writers D: the advantages of computers
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B

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Read the article and select the best answer. Article: Science is a dominant theme in our culture. Since it touches almost every aspect of our life, educated people need at least some idea of its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to obtain if one knows something about the things that excite and frustrate the scientist. This book is written for the intelligent student or lay person whose knowledge of science is superficial; for the person who has been presented with science as a musty storehouse of dried facts; for the person who sees the chief objective of science as the production of small devices; and for the person who views the scientists as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern world, or independently of any course, simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are widespread in our culture. We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populate it. That population has in recent years come to consist of more and more women. This increasing role of women in the scientific subculture is not an unique incident but, rather, part of the trend evident in all parts of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and... Question: According to this passage, _ . Options: A: English is a language full of sexual discrimination. B: only in the scientific world is the role of women increasing rapidly. C: women are making significant contributions to eliminating the inadequacy of our language. D: male nouns or pronouns should not be used to refer to scientists.
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D

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Read the article and select the best answer. Article: When you choose a freezer, remember it's probably going to be with you for a long time. So it's important to know which freezer is right for your needs. First, decide if you want an upright or chest model. Uprights are more convenient. Their storage space is more accessible and they take up less floor area. However, chest models are more energy-efficient because less cold air escapes when they are open. If you are buying an upright, you'll have to choose between frostless or manual defrost . Chest freezers are always manual. Frostless freezers automatically defrost at present intervals and remove the water. Manual models must be defrosted by hand every few months or whenever frost pile up to about a quarter of an inch. To help your freezer reach a ripe old age, try to find a spot that's cool, dry, and away fromdrafts . Drafts and heat will raise the freezer's cabinet temperature, which makes it work harder to keep cool. That means wasted energy. That means wasted energy and a shortened life. Dry air is important because highhumidity can cause the freezer to rust outside and frost up inside. With proper care, a freezer can serve you for 15 years or more. Regular cleaning and simple maintenance will help it maintain a zero-degree temperature and keep it smelling fresh and looking almost new. Frostless models requires less care than manual defrost freezers. The inside of a frostless unit should be washed periodically with warm water and baking soda or a mild soap, rinse, and dried. Good habits go a long way toward a freezer that runs efficiently. To get the most from your freezer, check regularly to make sure it's providing a true zero-degree temperature. Keep the freezer at least three-quarters full. The emptier it get, the more energy is wasted. If more than three pounds of food per cubic foot of storage space is added every 24 hours, the resulting high or low temperature can damage the food. Question: In order to get the best results, you should _ . Options: A: use cool water to wash the inside of frostless models B: keep the freezer at least 75% full C: add three pounds of food every 24 hours D: put your freezer in a garage with a strong floor
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B