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Article: A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increases the risk. Researchers from the University of Iowa based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma . They said that they found _ in studies that had reported associations between sunscreen use and higher risk of melanoma. Most health experts believe that by protecting the skin from the harmful effects of the sun, sunscreen helps prevent skin cancer, which is increasing in incidence faster than any other cancer in the United States. But questions have been raised about sunscreen and whether it may have the opposite effect, perhaps by allowing people to remain exposed to the sun longer without burning. The researchers said that among the problems with some earlier studies is that they often failed to take into account that those people most at risk for skin cancer--people with fair skin and freckles , for example--are more likely to use sunscreen. As a result, it may appear that sunscreen users get cancer more often. The studies, which generally relied on volunteers to recall their sunscreen use, were also unable to prove how well the products had been applied, said the new study. Question: People with fair skin and freckles _ . Yes or no, is the answer "are more in danger of skin cancer"?
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No

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Article: Canadian scientists have found that the more emotional or mental challenges a person faces in a day, the less determined they become to work out physically. However, the findings should not stop us from keeping fit. Experts believe that willpower is like a muscle, and needs to be exercised to help one avoid the temptation spending a night on the couch instead. Kathleen Martin-Ginis, a professor of kinesiology-the science of movement--who led the study, says everyone has a limited amount of willpower, and that it will be reduced by stress. Miss Martin-Ginis, of Canada's McMaster University, explains," Cognitive tasks, as well as tasks such as regulating one's emotions, can reduce one's capacity to force oneself to exercise. " Her team of scientists performed a so-called "Stroop" test on volunteers to reach their conclusions. The experiment involved showing participants words associated with color1s but printed in different color1s-for example, the word "blue" written in red ink Participants were divided into two groups. One group was asked to name the color1 of the ink, instead to say the printed word, while the other wasn't Martin-Girus says, "After we used this cognitive task to use up their self-regulatory capacity, the participants didn't exercise as hard as those who had not performed the task " The more people concentrated on the cognitive task, the more likely they were to skip exercise sessions over the next eight week You only have so much willpower. However, there are ways to strengthen willpower. The study found the listening to music before going to the gym can help, as well as making a commitment to work out with friends. It also concluded that willpower can be stretched by constant cake, or forcing oneself to study an extra hour each night Martin- Ginis adds," There are strategies people can use to help revitalize themselves after they've used up their self-regulation Willpower is like a muscle: it needs to be used to stay strong. " Question: What can we infer from the passage? , Yes or no, is the answer "Will power can be challenged to become powerful."?
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No

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Article: On Nov.18,1995,Itzhak Perlman,the violinist,came on stage to give a concert.If you have ever been to a Perlman concert,you know that getting on stage is no small achievement for him.He was stricken with polio as a child,and so he walks with the aid of two crutches. The audience sat quietly while he makes his way across the stage to his chair and begins his play.But this time,something went wrong.Just as he finished the first few bars,one of the strings on his violin broke.We thought that he would have to stop the concert.But he didn't.Instead,he waited a moment,closed his eyes and then signaled the conductor to begin again. Of course,anyone knows that it is impossible to play a pleasant work with just three strings.I know that,and you know that,but that night Itzhak Perlman refused to know that. When he finished,there was a breathtaking silence in the room.And then people rose and cheered.There was an extraordinary outburst of applause from every corner of the auditorium. He smiled,wiped the sweat from this brow and then he said-not proudly,but in a quiet,holy attitude-"You know,sometimes it is the artist's task to find out how much music you can still make with what you have left." This powerful line has stayed in my mind ever since I heard it.And who knows?Perhaps that is the meaning of life-not just for artists but for all of us. So,perhaps our task in this fastchanging,puzzling world in which we live is to make music,at first with all that we have,and then,when that is no longer possible,to make music with what we have left. Question: What made Itzhak Perlman's performance at the concert special on Nov.18,1995? Yes or no, is the answer "One string of the violin got broken."?
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No