"If you want to see a thing well,reach out and touch it!" That may seem a strange thing to say.But touching things can help you to see them better. Your eyes can tell you that glass ball is round.But by holding it in your hands,you can feel how smooth and cool the ball is.You can feel how heavy the glass is. When you feel all these about the ball,you really see it. With your skin,you can feel better.For example,your fingers can tell the difference between two coins in your pocket.You can feel a little drop of water on the back of your hand,too. You can even feel sounds against your skin.Have you ever wanted to know why some people like very loud music? They must like to feel the sounds of music. All children soon learn what "Don't touch!" means.They hear it often.Yet most of us keep on touching things as we grow up.In shops,we touch things we might buy,such as food,clothes and so on.To see something well,we have to touch it. The bottoms of our feet can feel things,too.You know this when you walk on warm sand,cool grass or a bad floor.All feel different under your feet. There are ways of learning to see well by feeling. One way is to close your eyes and try to feel everything that is touching your skin.Feel the shoes on your feet,the clothes on your body,the air on your skin.At first,it is not easy to feel these things.You are too used to them! Most museums are just for looking.But today some museums have some things to touch.Their signs say,"Do touch! There you can feel everything on show.If you want to see better,reach out and touch.Then you'll really see!" By touching things _ . A) you will have a strange feeling B) you will learn how to reach out C) you can tell the difference between them D) you can tell what colors they are
C
(Question)
In the 1960s Professor Bolin predicted that the "greenhouse effect", caused by an increase in the amount of carbon dioxide (CO2) in the atmosphere, would lead to important changes in the Earth's climate. At the time his prediction were regarded as science fiction. But it is now gradually agreed that the amount of carbon dioxide in the atmosphere will double from 0.03% to 0.06% in the next 50 years and that temperatures worldwide will rise by 2degC. Although a temperature rise of 2deg may not seem significant, the local effects may be much greater: in polar regions a rise of 10deg by 2025 is expected and in Northern Europe a rise of 4deg. Indeed the first effects were expected to be felt before the end of the 20th century. But how does the "greenhouse effect" _ and why should such a tiny proportion of CO2have such a harmful effect? When living creatures breathe out or when things are burned, CO2enters the atmosphere. Until recently all of this was absorbed by plants, which converted it back into oxygen. However, the balance of nature has been disturbed. In power stations, in factories and in our cars, we are burning more and more fossil fuels (coal, oil and natural gas) and this produces huge quantities of CO2--18 billion tons of it enter the atmosphere every year. Added to this, the destruction of forests means that less CO2can be converted into oxygen by plants. So, the amount of CO2in the atmosphere is increasing every year. The amount of CO2in the atmosphere is increasing every year because _ . A) Carbon dioxide is produced when we breathe. B) Carbon dioxide is produced when we burn things. C) More forests are destroyed and more fossil fuels are burned. D) The global temperature keeps rising.
(Answer)
C
Ques: Have you ever wished that you could make your little sister's teddy bear talk to her? Or have you ever wanted to bring a puppet to life? If so, you may be interested in learning the art of ventriloquism . A ventriloquist can make an ordinary object seem to be alive by giving it a personality, movement, and speech. Your object can be a puppet, or a doll. Give your new "friend" a name, and then decide on the personality that he will have. The next step is to give your friend movements that agree with the personality you have chosen. Now you can learn to make your "friend" talk. A ventriloquist will control his mouth and lips so that it will appear that his voice is coming from the object he is using. This will take practice, but you can do it. First, decide on a voice that is different from your own. It could be higher or lower than yours, or could even have a special accent. Then, find a clean teaspoon and hold the handle between your front teeth. Now, using the voice you created for your friend and holding the handle of the teaspoon tightly between your teeth, look into a mirror and talk. Practicing with the spoon in your mouth will help you learn to keep your mouth from moving. Now try telling a joke in your normal voice and have your friend speak in his voice. Practice those words until you can say them without your lips moving at all. Ventriloquism is fun. It also requires hard work to become good at it. The most important thing to do is practice. But if you are willing to take the time to give your friend an interesting personality, to practice lively movements, and to work on good mouth control, then you will be well on your way to becoming a ventriloquist! According to the text, a ventriloquist _ . A) is a person who can make puppets B) needs to work with another person C) can speak without using his mouth D) can make an object seem to speak
Ans: D
Alzheimer's disease affects millions of people around the world. American researchers say the disease will affect more than one hundred million people worldwide by the year twenty fifty. That would be four times the current number. Researchers and doctors have been studying Alzheimer's patients for a century. Yet the cause and the cure for the mental sickness are still unknown. However, some researchers have made important steps towards understanding it. Several early signs of the disease involve memory and thought processes. At first, patients have trouble remembering little things. Later, they have trouble remembering more important things, such as the names of their children. There are also some physical tests that might show who is at risk of developing Alzheimer's disease. The tests look for proteins in brain and spinal cord fluid. The proteins appear to be found only in people with the disease. The protein tests correctly identify the presence of the disease in about ninety percent of patients. Now, a much simpler physical test to predict Alzheimer's risk has been developed. Researchers found that trouble with the sense of smell can be one of the first signs of Alzheimer's. Using this information, they developed a test in which people were asked to identify twelve familiar smells. These smells included cinnamon, black pepper, chocolate, paint thinner, and smoke. The study continued for five years. During this period, the same people were asked to take several tests measuring their memory and thought abilities. Fifty percent of those who could not identify at least four of the smells in the first test had trouble with their memory and thinking in the next five years. Another study has shown a possible way to reduce a person's chances of developing Alzheimer's disease in old age. Researchers in Chicago found that people who use their brains more often are less likely to develop Alzheimer's disease. Those who read a newspaper, or play chess or word games are about three times less likely to develop the... Whats the current number of Alzheimers patients? A) 100 million B) 25 million C) 400 million D) 2050 million
B