山东师大附中2014高三第三次模拟考试英语试题试卷(4)

　　　Processed foods contain chemical elements, which might confuse the appetite mechanism that tells us when we’ve had enough to eat; as a result, people often overeat . Processed foods also upset the digestive cycle. The body will either identify these foods as allergens and then store them safely away from the organs as fat, or the remains of undigested food will become acidic and enter the bloodstream as acid waste, which will stick to the blood vessel walls and block the passage of vital oxygen and nutrients heading for the body’s cells. The body’s metabolism(新陈代谢) becomes inactive, and then result is weight gain and obesity.
　　　The accumulation of acid in the digestive tract makes digestion increasingly inefficient. When that happens, even healthy foods can become acidic and the food allergies will become more common.
　　　To stop this vicious(恶性的) circle in its tracks, people need to consume food and supplements that will neutralize （使…中和）the acid already accumulated in body. Eating the right types of raw and whole foods can help. it’s also important to restore your enzyme balance. You need to identify and avoid the foods that cause acid accumulation and consume the foods that increase enzyme production. If you truly want to change and help your body heal itself , you need to take an active approach..
56. What is the main purpose of this passage?   
A. To advocate eating more raw and whole foods
B. To tell the differences between raw and processed foods
C. To inform people of the harm of processed foods 
D. To warn people of the problem of obesity
57. It can be inferred from Para. 2 that    
A. it is essential for people to protect their vital organs 
B. foods with natural enzymes help people keep fit
C. we’d better be cautious about raw and whole foods  
D. giving up cooked and refined foods is a new lifestyle
58. Processed foods are unhealthy because they    
A. destroy body’s cells     B. are difficult to digest
C. may lead to obesity      D. stop body’s metabolism
59. What is likely to be talked about following the last paragraph?
A. Active approaches to avoid acid .  B. Different causes of acid accumulation.
C. Correct ways to cook raw foods .  D. Suitable types of raw and whole foods.
60. What can we learn from the text?
A. Processed foods are good for our appetite mechanism
B. Eating the right types of raw and whole foods does good to our body
C. The accumulation of acid in the digestive tract makes digestion more effective
D. Processed foods also comfort the digestive tract
E
　　　Electrical devices(仪器)could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking , British scientist Max Donelan and other scientists in Canada and the United States developed the device.
　　　The device connects to a person’s knee. As the person walks ,the device captures energy each time the person slows down. To do this ,the device helps with the slowing sown movement of the leg, the movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
　　　There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also he used in hospitals to operate heart pacemakers(起博器), it could even be used to assist in the movement of robotic arms and legs.
　　　The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, but the researchers hope to make a lighter, less costly version, An improved version should be ready in one year.
　　　The developers hope the device will one day help developing countries; nearly twenty five percent of people around the world live without electric power.
　　　A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania, He created a bag carried on a person’s back that also produces power from walking. The knee device does not produce as much electricity as the bag, but the bag requires the walker to carry a load of twenty to thirty kilograms.
61. The second paragraph mainly talks about    
A. who developed the device    B. how the device works
C. several possible uses for the devices  D. how much electricity the device can produce
62. What is the disadvantage of the experimental version of the device?
A. It is too heavy for the walker to bear   B. It is too complex for people to use
C. It is too expensive for most people to afford D. It will slow down one’s walking speed
63. Compared with the device designed by Larry Rome, this new device    
A. produces power without adding more loads to the walker
B. can produce more power in a much shorter time
C. needs to be equipped with a battery
D. can help the walker walk faster
64. From the passage, we can learn that the electrical device can    
A. help housewives operate the washing machine
B. make it much easier for us to go online
C. produce more electricity than that invented by Larry Rome
D. be applied in medical fields to operate heart pacemakers
65. What would be the best title for the passage
A. First device powered by walking will soon be on the market
B. Advanced technology brings in a new way to operate heart pacemakers