首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Sunbath and Skin Cancer In the summer, millions of Americans will offer up their bodies to the sun rays. A tan indicates health
Sunbath and Skin Cancer In the summer, millions of Americans will offer up their bodies to the sun rays. A tan indicates health
admin
2009-07-11
39
问题
Sunbath and Skin Cancer
In the summer, millions of Americans will offer up their bodies to the sun rays. A tan indicates health and beauty, and most sun worshippers will sacrifice a lot to achieve it, including themselves.
With each hour, the sun’s ultraviolet (紫外线的) radiation produces irreversible (不可逆的) damage, hastening the development of unsightly wrinkles. And with each year on the beach or rooftop, the sunbather increases his risk of getting skin cancer. Skin cancer is by far the most common form of cancer. An estimated 400,000 new cases will be detected this year in the United States, and almost all of them can be blamed on over-exposure to the sun.
Fortunately ,most of these cancers are highly curable. But they can be disfiguring and take time to treat. For that reason, sun worshippers should treat deity with a good deal of awe(敬畏). Sunburn, of course, is the initial hazard posed by UV radiation. Prolonged exposure to UV, however, interferes with the production of collagen fibers in the dermis (真皮层), causing the skin to lose elasticity (弹性) and creating premature wrinkles. Further deterioration (恶化) of the dermis deprives the epidermis (表皮层)of nutrition and causes it to become thin and dry.
Cancer is UV’s final result. Shortwave radiant energy, especially from the UV-B band, breaks the strands of DNA.Enzymes (酶) work constantly to rearrange the (变异的) DNA into proper sequence, but with repeated UV exposure, the repair process may eventually break down. Then the mutant DNA may produce a colony of cancer cells. But skin cancer may be avoided with a good dose of common sense. People with fair skin and blue eyes who burn easily stand the highest risk. Special danger spots are the parts of the body most constantly exposed to the sun, such as the cheeks, nose, lower lip and the ears. People who have already developed precancerous (癌变前的) lesions (伤害) or had one skin-cancer growth stand a greatly increased chance of developing others.
Dermatologists (皮肤科医生) recommend avoiding the sun when it is most intense between 11 a.m. and 3 p. m. Anyone who insists on sunbathing should use a good sun screen. These lotions and salves contain chemicals that block out the burning UV-B radiation while permitting the tanning rays to reach the skin.
选项
A、The skin cancer.
B、The wrinkles that cannot be seen.
C、All kinds of sacrifices.
D、Healthful beauty.
答案
A
解析
题意:如果一个日光浴者长期呆在海滩,会有什么后果?皮肤癌。短文第;段提到“随着日光浴者在海滩或者房顶所花的时间越来越多,他们患皮肤癌的危险性也就越大”,故选A。
转载请注明原文地址:https://kaotiyun.com/show/J41d777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Usingtheinformationinthetext,completeeachsentence14-18,withawordorphrasefromthelistbelow.Foreachsentenc
Readthefollowingpassage,eightsentenceshavebeenremovedfromthearticle.ChoosefromthesentencesA-Htheonewhich
Tradeiscentraltohumanhealth,prosperityandsocialwelfare.【R1】______Examplesoftradeindailylifearesoabundanttheys
Facialexpressionscarrymeaning,determinedbycontextsandrelationships.【R1】______Awoman’ssmileatapolicemanwhoisabou
Therearevariouswaysinwhichindividualeconomicunitscaninteractwithoneanother.Threebasicwaysmaybedescribedasth
Sincethebeginningoftheyear,myofficehasbecomearomanticbattlefield.Threerelationships,lastingtwoorthreeyears,h
1.Ancientpeoplemadeclaypotterybecausetheyneededitfortheirsurvival.Theyusedthepotstheymadeforcooking,storing
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
Ifaperformancebeginsat8p.m.,theGoddingtonTheatreTicketOfficere-opensat7:30thatevening.Youmustpayfortickets
Thereporterwasaccusedofunprofessionalconduct.
随机试题
B超显示检查,可见到妊娠环的时间是在妊娠的
患者有偏瘫、偏身感觉障碍和偏盲,最可能由下述哪条血管闭塞引起
根据《会计档案管理办法》的规定,会计档案由单位会计机构负责整理立卷归档,并保管()移交单位的会计档案管理机构。
对于“营改增”的增值税一般纳税人企业,下列业务不得抵扣进项税额的是()。
下列关于涉及或有条件的修改其他债务条件债务重组处理的表述中,正确的有()。
当IP包头中TTL值减为0时,路由器发出的ICMP报文类型为
Whatarespausersremindedtodo?
AmericanRacetotheMoonTherootsofAmerica’splantolandamanonthemooncanbefoundoutsideofthecountry.Althoug
社交媒体的运用与其说造成了分歧,不如说放大了分歧。(not…somuchas…)
PassageThree(1)InthenorthernItaliancityofTreviso,aPolishpianist,SlawomirZubrzycki,sitsdownataninstrument
最新回复
(
0
)