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1、2015届高考英语二轮专题检测精品练习：阅读理解（24）AA new study has found no evidence that sunscreen, commonly used to reduce the risk of skin caner, actually increases the risk.Researchers from the University of lows based their firdings on a review of 18 earlier studies that looked at the associstion between sunscreen u
2、se and melanoms(黑素瘤). They said that they found flaws 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 helpsprevent skin cancer, which is increasing in in
3、cidence (发生率) 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 st
4、udies is that they often failed to take into account that those people most at risk for skin concerpeople with fair skin and freckles （雀斑）,for exampleare more likely to use sunscreen. As a result, it may appear that sunscreen users get cancer more often.The studies, which generally relied on volunte
5、ers to recall their sunscreen use, were also unable to prove how well the products had been applied, said the new study.72.The underlined word “flaws” in the 2nd paragraph most probably means .A.evidencesB.factsC.faultsD.failures73.People with fair skin and freckles .A.seldom use sunscreenB. are mor
6、e in danger of skin concerC. can be free from the harm of the sunD. often expose themselves to the sun74.We can learn from the passage that .A. sunscreen users get skin cancer more oftenB. the volunteers have proved the effect of sunscreenC. the new study was based on the experiences of volunteersD.
7、 the number of skin cancer patients is increasing in America75.Which of the following can be the beat title for this passage?A. Sunscreen to Prevent Skin CancerB. Sunscreen to Increase Skin CancerC. Skin Cancer Caused by SunscreenD. Skin Cancer Caused by FrecklesB（2014四川卷）Women are friendly. But men
8、 are more competitive. Why? Researchers have found its all down to the hormone oxytocin (荷尔蒙催生素). Although known as the love hormone, it affects the sexes differently.Women tend to be social in their behavior. They often share with others. But men lend to be competitive. They are trying to improve t
9、heir social status, said Professor Ryan.Generally, people believe that the hormone oxytocin is let out in our body in various social situations andour body creates a large amount of it during positive social interactions (互动) such as falling in love or giving birth.But in a previous experiment Profe
10、ssor Ryan found that the hormone is also let out in our body during negative social interactions such as envy.Further researches showed that in men the hormone oxytocin improves the ability to recognize competitive relationships, but in women it raises the ability to recognize friendship. Professor
11、Ryans recent experiment used 62 men and women aged 20 to 37. Half of the participants（参与者）received oxytocin. The other half received placebo (安慰剂).After a week, the two groups switched with participants. They went through the same procedure with the other material.Following each treatment, they were
12、 shown some video pictures with different social interactions. Then they were asked to analyze the relationships by answering some questions. The questions were about telling friendship from competition. And their answers should be based on gestures, body language and facial expressions.The results
13、indicated that, after treatment with oxytocin, mens ability to correctly recognize competitive relationships improved, but in women it was the ability to correctly recognize friendship that got better.Professor Ryan thus concluded: Our experiment proves that the hormone oxytocin can raise peoples ab
14、ilities to better distinguish different social interactions. And the behavior differences between men and women are caused by biological factors (因素) that are mainly hormonal.47. What causes men and women to behave differently according to the text?A. Placebo. B. Oxytocin.C. The gesture. D. The soci
15、al status.48. What can we learn from Professor Ryans previous experiment?A. Oxytocin affects our behavior in a different way.B. Our body lets out oxytocin when we are deep in love.C. Our body produces oxytocin when we feel unhappy about others success.D. Oxytocin improves our abilities to understand peoples behavior differences.49. Why did Professor Ryan conduct the recent experiment?A. To test the effect of oxytocin on the ability to recognize social interactions.B. To know the differences between friendship and competition.C. To know peoples different abilities to answer question
