Article: An early invention by Albert Einstein has been rebuilt by scientists at Oxford University. They are trying to develop an environmentally friendly refrigerator that runs without electricity. We all know that modern fridges cause damage to the environment. They work by using a kind of man-made greenhouse gas called Freon , which is far more damaging than carbon dioxide. Now Malcolm McCulloch, an electrical engineer at Oxford, is leading a three-year project to develop appliances that can be used in places without electricity. His team has completed a prototype of a fridge patented in 1930 by Einstein. It used only pressurized gases to keep things cold. The design was partly used in the first refrigerators, but the technology was dropped when more efficient compressors became popular in the 1950s. That meant a switch to using Freon. Einstein's idea uses butane and water and takes advantage of the fact that liquids boil at lower temperatures, when the air pressure around them is lower. "If you go to the top of Mount Qomolangma, water boils at a much lower temperature than it does when you're at sea level and that's because the pressure is much lower up there," said McCulloch.At one side is the evaporator , a bottle that contains liquid butane. "If you introduce a new vapor above the butane, the liquid boiling temperature decreases and, as it boils off, it takes energy from the surroundings to do so," says McCulloch. "That's what makes it cold." The gas fridges based on Einstein's design were replaced by Freon-compressor fridges partly because Einstein's design was not very efficient. But McCulloch thinks that by changing the design and replacing the types of gases used it will be possible to quadruple the efficiency. However, McCulloch's fridge is still in its early stages. "It's very much a prototype," he said. "Give us another month and we'll have it working." Question: We can learn from the text that the prototype completed _ . Yes or no, is the answer "used only pressurized gases to keep things cold"?
Yes

Article: This was no ordinary class. The students who came together were all science or engineering professors at Cornell University. They had interrupted their research to accept an invitation to take part in an unusual experiment: "an interesting week of poetry." This class was part of a study to answer the questions: Why is science difficult for many nonscience students? What can teachers learn about teaching if they take a class that is not in their field? The students in the poetry class listened to lectures and took notes. They had reading tasks and had to write three short papers. All students noticed one thing - the importance of spoken words. In science and engineering classes, the instructors put tables and drawings on the blackboard. But in this poetry class, the instructors just talked. They didn't write anything on the board. The scientists and engineers noticed one similarity between science and poetry. In both subjects, students need to find layers of meaning . Some layers are simple, clean, and on the surface; other layers are deeper and more difficult. This search for different levels of meaning doesn't happen much in undergraduate science classes, but it is important later, in graduate school. And it is always important in humanities . Both the poetry instructors and their students learned something about teaching from this experience. One poetry instructor, for example, now sees the importance of using informative as he teaches. Most of the scientists agreed on several points. First, humanities classes might help science students to see patterns and decide which information is important. Second, the poetry class was fun. One engineer decided, "We need to change the way we teach engineering to make to make it an enjoyable experience for students." But perhaps the most important result of the experience was this; All of the professors began to think about how they teach and how they cam teach better. Question: What did the science professors learn after the experiment? Yes or no, is the answer "They should change the way they teach"?
Yes

Q: Article: Glaucoma is a major cause of blindness around the world, especially in developing countries. The World Health Organization says glaucoma is a greater public health challenge than cataracts , because the blindness caused by the latter can be cured after operations. Glaucoma is a disease that makes people around the world lose their sight, and they usually don't even know they have the disease until it has permanently destroyed at least 40 percent of their sight. The process is usually so painless and subtle , so people don't notice it. Actually, the simplest medical test can discover it. "It is the leading cause of blindness in the United States. In Hispanics and in African-Americans, it's the second leading cause of blindness and so is the case in the Chinese and Indians." said Dr. Alan Robin, a specialist in treating glaucoma. "The glaucoma we see in sub-Saharan Africa is a much more aggressive blinding disease than the glaucoma we see in Americans or even African- Americans in-the United States." he said. . Dr. Eric Fleischer also sees at Medstar Washington Hospital Center. "Pretty much anybody who has ancestors in Africa has an increased chance of developing glaucoma." Age is another thing that may lead to glaucoma, although people of all ages can get it. Glaucoma is a group of diseases that commonly produce pressure in the eye. An eye is sort of like a watch. And behind the face of the watch, liquid is made. It goes through your pupil and into the front of the watch between the face and the crystal.There's an area around the edge of the watch that drains the liquid. When that drain is blocked, the liquid can't leave the eye as fast as it is produced. The rising pressure within the eye damages and eventually kills the optic nerve. The result is blindness. Fortunately, if caught early, glaucoma can be controlled. Glaucoma is not curable. But as researchers worldwide lean more about it, they grow more hopeful that glaucoma can one day be cured or even prevented. Question: In which country is glaucoma the biggest danger to people's sight? Yes or no, is the answer "In the USA"?
A: Yes

Article: There is much discussion today about whether economic growth is desirable. At an earlier period, our desire for material wealth may have been justified. Now, however, this desire for more than we need is causing serious problems. Even though we have good intentions, we may be producing too much, too fast. Those who criticize economic growth argue that we must slow down. They believe that society is approaching certain limits on growth. These include the fixed supply of natural resources, the possible negative effects of industry on the natural environment, and the continuing increase in the world's population. As society reaches these limits, economic growth can no longer continue, and the quality of life will decrease. People who want more economic growth, on the other hand, argue that even at the present growth rate there are still many poor people in the world. These proponents of economic growth believe that only more growth can create the capital needed to improve the quality of life in the world. Furthermore, they argue that only continued growth can provide the financial resources required to protect our natural surroundings from industrialization. This debate over the desirability of continued economic growth is of vital importance to business and industry. If those who argue against economic growth are correct, the problems they mention cannot be ignored. To find a solution, economists and business community must pay attention to these problems and discuss them with one another. Question: The passage is mainly about _ . Yes or no, is the answer "the present debate on economic growth"?
No