9.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 18earlier studies that looked at the association between sunscreen use and melanoma.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 form 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 question have been raise 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 use,were also unable to prove how well the products had been applied,said the new study.
13.The underlined word"flaws"in the 2nd paragraph most probably meansC.
A.evidences B.facts C.faults D.failures
14.We can learn from the passage thatD.
A.sunscreen users get skin cancer more often
B.the volunteers have proved the effects of sunscreen
C.the new study was based on the experiences of volunteers
D.the number of skin caner patients is increasing in America
15.Which of the following can be the best title for this passage?A
A.Sunscreen to Prevent Skin Cancer
B.Sunscreen to Increase Skin Cancer
C.Skin Cancer Caused by Sunscreen
D.Skin Cancer Caused by Freckles.
分析 本文主要寫了防曬霜對于皮膚的作用,
解答 13.C 詞義猜測題.從第一段A new study has found no evidence that sunscreen,…,actually increase the risk.一項新的研究發(fā)現(xiàn)沒有證據(jù)表明防曬霜實際上增加了風(fēng)險.得出…in studies that had reported associations between sunscreen use and higher risk of melanoma.防曬霜使用與黑色素瘤風(fēng)險增高的關(guān)系,存在"過錯".所以答案是C.
14.D 推理判斷題.從第三段…which is increasing in incidence faster than any other cancer in the United States.在美國發(fā)病率比其他任何癌癥都要快.可以推斷答案是D.
15.A 主旨大意題.文章主要談?wù)摲罆袼c皮服癌,并從最新的研究中證明sunscreen helps prevent skin cancer.防曬霜有助于預(yù)防皮膚癌.所以答案選A.
點評 閱讀理解題測試考生在閱讀基礎(chǔ)上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關(guān)系,對未說明的趨勢或結(jié)局作出合理的推斷;或根據(jù)作者所闡述的觀點理論,對文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細閱讀短文,完整了解信息,準(zhǔn)確把握作者觀點.