The World Health Organization(WHO)planned to study the relationship between the eating habits of the people and the disease.Two doctors were chosen to make the study. They flew to Africa south of the Sahara and during the next two months visited ten countries.They found that serious diseases of poor eating, often mistaken for other diseases, existed in all parts of Africa.The diseases were similar and could therefore all be named kwashiorkor .The diseased children are usually from one to four years old.As the illness progresses, the child's stomach becomes swollen by liquid collecting in the body.The skin changes colour and may break out in open sores.The hair changes colour and starts to fall out.The patient loses all interest in his surroundings and even in food, and becomes so weak that he wants to lie down all the time.Stomach liquids are no longer produced. The doctors reasoned that kwashiorkor was found in the young children of this age in many parts of Africa because of lack of milk or meat.Their mothers gave them foods full of starches instead of greatly needed proteins.They found that the addition of milk to the food of children suffering from kwashiorkor saved many lives. It is difficult to discover kwashiorkor because _ . A) it has no viruses B) it does not last long C) it is hard to see signs of it D) it is like other diseases
D
China is a land of bicycles. At least it was back in 1992 when I traveled the country. Back then everyone seemed to be riding a bicycle. Millions of them, all black. Cars were rare. Yet since my arrival in Beijing last year, I've found the opposite is true. There are millions of cars. However, people still use their bicycles to get around. For many, it's the easiest and cheapest way to travel today. Bicycles also come in different colors---silver, green, red, blue, yellow, whatever you want. It's fun watching people biking. They rush quickly through crossroads, move skillfully through traffic, and ride even on sidewalks . Bicycles allow people the freedom to move about that cars just can't provide. Eager to be part of this aspect of Chinese culture, I decided to buy a bicycle. Great weather accompanied my great buy. I immediately jumped up on my bicycle seat and started home. My first ride home was orderly . To be safe, I stayed with a "pack" of bikers while cars on the streets came running swiftly out of nowhere at times. I didn't want to get hit. So I took the ride carefully. Crossing the streets was the biggest problem. It was a lot like crossing a major highway back in the United States. The streets here were wide, so crossing took time, skill and a little bit of luck. I finally made it home. The feeling on the bicycle was amazing. The air hitting my face and going through my hair was wonderful. I was sitting on top of the world as I passed by places and people. Biking made me feel alive. How did the author feel about his street crossing? A) It was boring. B) It was difficult. C) It was lively. D) It was wonderful.
B
Q: Today just as technology changed the face of industry, farmers have undergone an "agricultural revolution". On the farm of today, machines provide all the power. One of the most important benefits will be the farm computer. A few forward-looking farmers are already using computers to help them run their farms more efficiently. The computers help them keep more accurate records so they can make better decisions on what crops to plant, how much livestock to buy, when to sell their products, and how much profit they can expect. Many computer companies have been developing special computer programs just for farmers. Programs are being written for hog producers, grain farmers, potato farmers, and dairy farmers. In the future, farmers will be able to purchase computer programs made to their needs. Because of the growing importance of computers on the farm, students at agricultural colleges are required to take computer classes in addition to their normal agricultural courses. There can be no doubt that farmers will rely on computers even more in the future. While the old-time farm depended on horse power, and modern farms depend on machine power, farms of the future will depend on computer power. Another technological advance which is still in the experimental stage is the robot, a real "mechanized hired hand" that will be able to move and, in some ways, think like a human being. Unlike farmers of the present, farmers of the future will find that many day-to-day tasks will be done for them. Scientists are now developing robots that will be able to shear sheep, drive tractors, and harvest fruit. Even complex jobs will be done by robots. For example, in order to milk their cows, farmers must first drive them into the special barn , then connect them to the milking machines, watch the machines, and disconnect them when they are finished. In the future, this will all be done by robots. In addition, when the milking is completed, the robots will automatically check to make sure that the milk is pure. The complete... What is the best title for the passage? A) Computer--Farmers' Best Friend B) Farmers in the Future C) Robots in the future D) Revolution on the farm
A: D
A lot of people are afraid of spiders . One would even avoid walking in grass . And if he thought the spider was in the room or house, he would have to leave the house for days. In fact, fear of spiders is a type of disorder called specific phobia , one of the most common anxiety disorders, which annoys about 7% of the population, a study says. Common specific phobias also include fear of blood, needles, snakes, flying and enclosed spaces. The Northwestern University Feinberg School of Medicine tried the "exposure Therapy ", which was small, done on 12 adults, but all of them held or petted the spider afterward. One participant celebrated by getting a spider tattoo after having been unable to even look at photos of spiders. This is the first study to document the immediate and long-term brain changes after treatment and to illustrate how the brain recognizes long-term to reduce fear as a result of the therapy. Every one would come in thinking: I am going to be the one who can't do this . There is no way ,"Haunter ,author of the study ,says "They were impressed by the end." In therapy lasting two or three hours, which is different for each person, the participants were taught that troublesome thoughts about spiders were untrue." "They thought the spiders might be capable of jumping out of the cage and on to them," Hauner says. Exposure therapy gets its name from exposing a patient to what he fears, says Todd, research assistant professor: "A lot of it about dispelling people's beliefs. You can get significant changes in a short period of time". Which of the following is true about the people with "specific phobia?" A) They don't dare to walk in grass B) They are afraid of spiders by nature C) 7% of them need medical treatment. D) They have a sense of scare about something.
D