Question: Read the article and select the best answer. Article: Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen. The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country's bees. He imported a very active type of African bee from Tanzania and mated it with the more easy-going native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.www.zxxk.com Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places. But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings , began to attack its neighbors -- cats, dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings. This would have been bad enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them. Question: The experiment mentioned in this passage was designed to _ . Options: A: make African bees less active B: make Brazilian bees more easy-going C: increase the number of bees in Brazil D: increase the amount of honey in Brazil
Answer: D

Question: Read the article and select the best answer. Article: What is the nature of the scientific attitude, the attitude of the man or woman who studies and applies physics, biology, chemistry, geology, engineering, medicine or any other science? We all know that science plays an important role in our societies. However, many people believe that our progress depends on two different aspects of science. The first aspect is the application of the machines, products and systems of knowledge that scientists and technologists develop. The second is the application of the special methods of thought and action that scientists use in their work. What are these special methods of thinking and acting? First of all, it seems that a successful scientist is curious - he wants to find out how and why the universe works. He usually pays attention to problems which he notices have no satisfying explanation, and looks for relationships even if the data available seem to be unconnected. Moreover, he thinks he can improve the existing conditions and enjoys trying to solve the problems which this involves. He is a good observer, accurate, patient and objective and uses the facts he observes to the fullest. For example, trained observers obtain a very large amount of information about a star mainly from the accurate analysis of the simple lines that appear in a spectrum . He does not accept statements which are not based on the most complete evidence available. He rejects authority as the only basis for truth. Scientists always check statements and make experiments carefully and objectively. Furthermore, he does not readily accept his own idea, since he knows that man is the least reliable of scientific instruments and that a number of factors tend to disturb objective investigation. Lastly, he is full of imagination since he often has to look for relationships in data which are not only complex but also frequently incomplete. Furthermore, he needs imagination if he wants to guess how processes work and how events take place. These seem to be some of the ways in which a successful... Question: According to the passage, a successful scientist would NOT _ . Options: A: easily believe in unchecked statements. B: easily criticize others' research work. C: always use his imagination in work. D: always use evidence from observation.
Answer: A

Question: Read the article and select the best answer. Article: In the hot jungles of Thailand, forest rangers came across a terrible sight one day in 2010. Two tiger cubs lay dead in a wildlife preserve . The rangers were too late to find the cubs' mother. All that remained of her was blood on the ground. Poachers had poisoned the tigers. Then they ran off with the mother's body. If the rangers had not arrived, the poachers would have taken the cubs too. Tigers in trouble One hundred years ago, there were about 100,000 tigers. Today, only about 3,200 remain in the wild. Poachers are a major problem. These killers sell tiger fur, teeth, claws, and other body parts in illegal markets. One tiger's parts can see for $50,000. Because they hunt in huge jungles thick with trees, poachers are hard to find. But they must be caught, says Elizabeth Bennett of the Wildlife Conservation Society. This group works to help endangered animals. Tiger "fingerprints" Finally, after many months, the rangers spotted the poachers again. After an exchange of gunfire, they arrested the criminals. Soon, the police found evidence that the poachers had killed again. The evidence came from a cell phone. On a poacher's phone, police found photos of the men posing with a dead male tiger. The poachers claimed that the photos were from a nearby country where tigers aren't protected. But another photo told a different story. Deep in the Thai forest, the rangers had set up camera traps, which take photos when they sense movement. A camera trap photo showed the same male tiger walking through a wildlife preserve before he was killed. That meant that the tiger came from a protected area. But how could police prove it was the same tiger? Tiger stripes are like fingerprints. No two patterns are the same. When police compared the photos, the stripes on the tiger's head matched. The poachers were given up to five years in prison. That might not seem like much for killing tigers. But since the poachers were caught in July 2011, no tigers have been killed in that wildlife preserve. Question: Why didn't the poachers take the cubs? Options: A: There wasn't enough time. B: The cubs' body parts sold badly. C: The cubs were protected by the rangers. D: They didn't bring enough tools to carry them.
Answer:
A