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Article: Put an ice cube from your fridge into a glass of water. You have a piece of string 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers. You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment. First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt . The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze again. After a minute or two you may raise the piece of string and with it you will raise your piece of ice! This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don't put enough salt, the water will freeze again. Question: We can learn something about _ from the passage. Yes or no, is the answer "chemistry"?
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No

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Article: Solomon Shereshevski was a man with an amazing memory. He was one of the world's most famous me-monists . Born in Russia in about 1900, he spent much of his life performing memory skills that people found difficult to believe. He could memorize long lists of numbers after reading them through once, and he could then recite them forwards or back-wards. He could also remember the same numbers months later. He could easily remember lists of names, dozens of playing cards or hundreds of cities. Although he had a wonderful memory, he found some normal skills very difficult. For example, he found it difficult to learn to read. He also found it difficult to recognize patterns in words or numbers. When presented with a long list of numbers like this: 1234 4231 5678 8765 6789 9876 he could not see that there was a pattern. If he could see or hear a collection of numbers, he could remember it. However, this did not mean that he could understand what he was looking at. He could remember long complex mathematical formulas, but could not understand what the numbers meant. Solomon suffered from a condition known as Synaesthesia. This meant that all of his senses were connected in a special way. In other words, when he heard a particular word he also experienced a unique taste, or saw a unique color1. Each word that he heard brought a particular description into his mind. Each word for him was unique, because he remembered it as a taste, a smell, a color1 or a sound, or all of them together. He was not a clever man except this ability and people found him rather stupid. He found it difficult to become friends with other people because his mind was so different. In a way, his memory was a curse . He remembered everything, and that made it difficult for him to understand anything. Question: The author wants to express an idea that . Yes or no, is the answer "having a good memory does not mean having good intelligence"?
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No

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Article: The curtain on the 2008 US presidential election finally rose last month as John McCain and Barack Obama were formally nominated as candidates of the two major parties. This may be one of the hardest decisions voters have to make between two appealing candidates. The big question for voters, as they face both an economic downturn and international threats, is: who will they elect? A young first-term senator promising change and new ideas, or a longtime senator with strong military experience and a reputation as a maverick ? American voters have never seen a candidate quite like Obama. He has a white mother from theprefix = st1 /USand a black father fromKenyawho left the family when Obama was very young. He spent part of his youth inIndonesia. His supporters say Obama's childhood gives him the advantage to repair the recent damage done toAmerica's image abroad. His opponents focus on his inexperience, noting he hasn't finished his first term in the Senate. However, McCain has a very different life story. He grew up in a Navy family and was a pilot during the Vietnam War in the 1960s. When Obama was in kindergarten in Indonesia, McCain's plane was shot down overVietnamand he became a prisoner of war. McCain could have been released if he _ Americabut he refused and so was held for five years. So in the end, the election may hinge on (...) several factors that are hard to judge: Will Obama's race matter to a significant number of voters? Will working-class whites who tended to support his primary opponent, Hillary Clinton, vote for Obama? And perhaps most important of all, will swing voters be more drawn to Obama's vision or to McCain's experience? Whatever happens, one thing is clear: Whoever walks into the White House on January 20, 2009, will find enormous challenges waiting for him in the Oval Office, both at home and abroad. Question: _ makes the result of the election hard to predict. Yes or no, is the answer "Who swing voters will finally decide to vote for"?
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No