Ifyouthinkahigh-factorsunscreen(防晒霜)keepsyousafefrom...
問題詳情:
If you think a high-factor sunscreen (防晒霜) keeps you safe from harmful rays, you may be wrong. Research in this week’s Nature shows that while factor 50 reduces the number of melanomas (黒瘤) and delays their occurrence, it can’t prevent them. Melanomas are the most aggressive skin cancers. You have a higher risk if you have red or blond hair, fair skin, blue or green eyes, or sunburn easily, or if a close relative has had one. Melanomas are more common if you have periodic intense exposure to the sun. Other skin cancers are increasingly likely with long-term exposure.
There is continuing debate as to how effective sunscreen is in reducing melanomas--- the evidence is weaker than it is for preventing other types of skin cancer. A 2011 Australian study of 1,621 people found that people randomly selected to apply sunscreen daily had half the rate of melanomas of people who used cream as needed. A second study, comparing 1,167 people with melanomas to 1,101 who didn't have the cancer, found that using sunscreen routinely, alongside other protection such as hats, long sleeves or staying in the shade, did give some protection. This study said other forms of sun protection ---not sunscreen--- seemed most beneficial. The study relied on people remembering what they had done over each decade of their lives, so it's not entirely reliable. But it seems reasonable to think sunscreen gives people a false sense of security in the sun.
Many people also don't use sunscreen properly ---applying insufficient amounts, failing to reapply after a couple of hours and staying in the sun too long. It is sunburn that is most worrying--- recent research shows five episodes of sunburn in the teenage years increases the risk of all skin cancers.
The good news is that a combination of sunscreen and covering up can reduce melanoma rates, as shown by Australian figures from their slip-slop-slap campaign. So if there is a heat wave this summer, it would be best for us, too, to slip on a shirt, slop on (抹上) sunscreen and slap on a hat.
32. What does the research in Nature say about a high-factor sunscreen
A. It is ineffective in preventing melanomas.
B. It is ineffective in case of intense sunlight.
C. It is ineffective with long-term exposure.
D. It is ineffective for people with fair skin.
33. What do we learn from the 2011 Australian study of 1,621 people
A. Sunscreen should be applied alongside other protection measures.
B. High-risk people benefit the most from the application of sunscreen.
C. Irregular application of sunscreen does women more harm than good.
D. Daily application of sunscreen helps reduce the incidence of melanomas.
34. What does the author say about the second Australian study
A. It misleads people to rely on sunscreen for protection.
B. It helps people to select the most effective sunscreen.
C. It is not based on direct observation of the subjects.
D. It confirms the results of the first Australian study.
35. What does the author suggest to reduce melanoma rates
A. Using both covering up and sunscreen.
B. Staying in the shade whenever possible.
C. Using covering up instead of sunscreen.
D. Applying the right amount of sunscreen.
【回答】
ADCA
知識點:科普環保類閱讀
題型:閱讀理解
-
_____________,_____________。萬里悲秋常作客,百年多病獨登臺。杜甫《登高》
問題詳情:_____________,_____________。萬里悲秋常作客,百年多病獨登臺。杜甫《登高》【回答】無邊落木蕭蕭下,不盡長*滾滾來。知識點:其他題型:填空題...
-
.已知各項均不為零的數列{an},定義向量.下列命題中真命題是( )A.若∀n∈N*總有cn⊥bn成立,則數...
問題詳情:.已知各項均不為零的數列{an},定義向量.下列命題中真命題是()A.若∀n∈N*總有cn⊥bn成立,則數列{an}是等比數列B.若∀n∈N*總有cn∥bn成立成立,則數列{an}是等比數列C.若∀n∈N*總有cn⊥bn成立,則數列{an}是等差數列D.若∀n∈N*總有cn∥bn成立,則數列{an}是等差數列...
-
造成太平天國運動與以往農民起義具有新的不同特點的主要原因是( )A.領導階級不同 B.所處的...
問題詳情:造成太平天國運動與以往農民起義具有新的不同特點的主要原因是( )A.領導階級不同 B.所處的時代不同C.指導思想不同 D.起義*組成不同【回答】B知識點:近代*反侵略求*的鬥爭太平天國運動題型:選擇題...
-
近日我州某地成功處置了一輛滿載三*化*(PCI3)的車輛洩漏事故.三*化*是一種重要的無機鹽工業產品,無*液體...
問題詳情:近日我州某地成功處置了一輛滿載三*化*(PCI3)的車輛洩漏事故.三*化*是一種重要的無機鹽工業產品,無*液體、密度1.574g/cm3(21℃),熔點﹣112℃,沸點75.5℃,易燃.遇水反應生成亞**(H3PO3)和*化*,與有機物接觸會著火.下列對三*化*的說法錯誤的是()A.三*化*中*元素的化合價為+...
相關文章
- 完形填空Doyouthinkofyouparents? “yes,ofcourse,”youmayanswer...
- Surfing:it'sNotJustforBoysAnymoreIfyouaskedhighschoolgi...
- Youmaybesurprisedtosee"makingsurechildrennever'suffe...
- Youmaybesurprisedtosee"makingsurechildrennever'suffe...
- 閱讀短文,回答問題 Samlikeseatingfishverymuch.Heoftenbuysfishin...
- Youmaybesurprisedtosee"makingsurechildrennever'suffe...
- Youmaybesurprisedtosee"makingsurechildrennever'suffe...
- Youmaybesurprisedtosee"makingsurechildrennever'suffe...
- 閱讀短文回答問題。Exerciseisgoodforyoubecauseitcanhelpyoutokeepf...
- 完形填空Doyouoftenthinkofyourparents?Youmaysay,“Ofcourse,I ...