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Are some people born clever, and others born stupid? Or is intelligence developed by our environment and our experience? Strangely enough, the answer to these questions is yes. To some extent our intelligence is given to us at birth, and no amount of education can make a genius out of a child born with low intelligence. On the other hand, a child who lives in a boring environment will develop his intelligence less than one who lives in rich and varied surroundings. Thus the limits of person's intelligence are fixed at birth, whether or not he reaches those limits will depend on his environment. This view, now held by most experts, can be supported in a number of ways.It is easy to show that intelligence is to some extent something we are born with. The closer the blood relationship between two people, the closer they are likely to be in intelligence. Thus if we take two unrelated people at random from population, it is likely that their degree of intelligence will be completely different. If, on the other hand, we take two identical twins, they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have similar intelligence, and this clearly suggests that intelligence depends on birth.Imagine now that we take two identical twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring. We should soon find difference in intelligence developing, and this indicates that environment as well as birth plays a part. This conclusion is also suggested by the fact that people who live in close contact with each other, but who are not related at all are likely to have similar degree of intelligence.1.The writer is in favor of the view that a man's intelligence is given to him (  ).2.If a child is born with low intelligence, he can (  ).  3.In the second paragraph “if we take two unrelated people at random from population” means if we (  ).  4.The example of the twins going to a university and to a factory separately shows (  ).  5.The best title of this passage could be(  ).

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No one knows who was the first to invent the dice as we know them. What is remarkable is that they have remained virtually intact across national boundaries and all through the age ——small cubes marked by dots from 1 to 6, so placed that the sum of the dots on opposite sides equals 7. Dice much like those used today were found in China in unearthed cultural relics dating from 600 BC and in ancient Egyptian tombs dating from 2000BC, as well as in the ruins of Babylon. The playing of dice was popular in Greece and even more so in Rome, and dice were used throughout the Middle Ages. In the simplest play with dice each player throws, or shoots, for the highest sum. In China and in the United States the most popular dice game is played with two dice.The number of random numbers that can be expressed by two dice is very limited; the number are: 2,3,4,5,6,7,8,9,10.11 and 12, all eleven of them. The most probable throw is 7. The probability of 7 is six times that of 12. Therefore it would be ideal if a new kind of dice could be invented with an equal distribution of chances for each number. Well, such dice have already been invented by a British amateur astronomer by the name Aires. The new version.which the inventor calls “heartbreak dice”,also consists of two dice. But the number of random numbers that can be expressed by the new dice is more than three times that of the traditional ones, and the chances for each number are strictly equal.1.According to passage one, the Chinese had played dice (  ).2.Which of the following statements about dice in China is true?3.In regard to the new kind of dice, we can tell that(  ).

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It is impossible to reverse knowledge, but it is society’s prerogative to state which pieces of knowledge should remain unused. “Can do” never implies “must do”. It is rightly illegal to clone a human being in the UK, but it would not be beyond human perversity for someone to try to do it elsewhere in the world. One UK doctor, who has publicly condemned the very ideas, claims to have had people offering themselves for cloning or asking to have it done to loved ones. It would appear that some are attracted by the idea, but maybe they have not fully understood the implications. Even supposing someone would be stupid enough to try, there are many serious obstacles to be overcome. There is firstly the risk of imprisonment. A scientist would take the risk of ostracism from a disapproving medical and scientific establishment, and know that a journal would possibly refuse to publish any paper on the subject. Then, he or she would have to persuade or induce dozens of people to take part in prolonged illegal experiments. It would need donors, egg cell recipients and surrogate mothers in fairly large numbers, to take part in experiments. Abnormally large progeny have resulted in animal cloning done to date, which suggests that there are serious risks to the health of the mother and potential embryo.In order to prevent the genie from coming out of the bottle, there should be immediate moves to set up, if possible, an international binding treaty to ban experiments regarding human cloning worldwide.1.This short article is mainly about (  ).2.Why does putting “clone man'' to practice face so many obstacles?3.In order to prevent the genie from coming out of the bottle, we should do all the following except that (  ).  4.All the following are the obstacles that a doctor can meet when trying to clone a human being except (  ).    

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