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 hea
Sunbath and Skin Cancer In the summer, millions of Americans will offer up their bodies to the sun rays. A tan indicates hea
admin
2016-07-17
29
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 radiation(紫外线)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 he 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(胶原纤维)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(股、缕)of DNA. Enzymes(酶)work constantly to rearrange the DNA into proper sequence, but with repeated UV exposure,the repair process may eventually break down. Then the mutant(变异的)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(药膏)contain chemicals that block out the burning UVB radiation while permitting the tanning rays to reach the skin.
According to the passage, over-exposure to the sun may result in______.
选项
A、the wrinkles that cannot be seen
B、the skin cancer
C、all kinds of sacrifices
D、healthful beauty
答案
B
解析
在读题时应抓住“over—exposure”一词,在第二段的最后一句“...and almost all ofthem can be blamed on over—exposure to the sun.”A项“皱纹”和D项“健康美”都是一般的暴晒引起的而非过度暴晒引起。C项“不惜一切代价”跟过度暴晒没有因果关系。
转载请注明原文地址:https://kaotiyun.com/show/vLhd777K
本试题收录于:
职称英语卫生类A级题库职称英语分类
0
职称英语卫生类A级
职称英语
相关试题推荐
WhichofthefollowingisNOTtrueofministrokes?Thepassageindicatesthatthesymptomsofministrokes
AManagement’sReactiontotheLaborMovementBTheDeclineofanEarlyUnionCReasonsforStartingaUnionDComparisonbe
Themajorityofpeoplearoundherearedecentpeople.
Healthworkersthemselvesareawareoftheimportanceofcontinuedtraining.Moreeffectivecontinuingmedicaleducationiscal
AEffectsofNappinginFemalesStillUncertainBOlderMalesHaveHigherLevelsofNT-proBNPCDevelopmentofaSimplebutI
HeartAttackThroughouttheUnitedStates,andespeciallyinbigcitiesandruralareas,tensofthousandsofpeoplewithhearts
EatforaGoodandHealthfulLifeFood(1)usalive.Itisoursustenanceandourpleasure.Butrecently,researchhasshownthat
Diet,AlcoholLinkedtoNearlyOneThirdofCancersDietissecondonlytotobaccoasaleading(1)ofcancerand,alongwithalcoh
"Iamnotmeddling."Marysaidmildly,"I’mjustcurious."
Thechairmanproposedthatweshouldstopthemeeting.
随机试题
按顺序排列下面的语句,组成语意连贯的一段话,排序正确的一项是()。①人类世界所创造出来的奇异图案浮露在鼎身上,各种图腾以一定的秩序排列着,构成一个无言的小宇宙。②饕餮的脸孔、凤凰的姿势、龙虎的文身、鱼兽的混种、牛羊的肢体……幻觉的、
在计算机网络中,LAN网指的是广域网。()
腹腔干动脉的分支叙述正确的是
甲公司是一家电视机生产企业,职工总数为1000人,其中700人是生产工人,200人为行政管理人员,100人为生产管理人员。2019年甲公司发生如下经济业务:(1)7月,甲公司当月应发工资2000万元,其中生产工人工资1500万元,生产管理人员工资200万
“教育主体确定,教育对象稳定,有相对的稳定的活动场所和设施等教育实体出现,教育初步定型”这些特征的出现标志学校教育制度进入()。
简述操作技能的培训要求。
(1.1)2+(1.2)2+(1.3)2+(1.4)2的值是( )。
pwd是一个FTP用户接口命令,它的作用是()。
Hiersind______Bilder.Dortist______Buch.
A、BecauseofthestrongFrenchinfluence.B、Becausetheysharedthesameroad.C、Becausetheybelongedtothesamecountry.D、Be
最新回复
(
0
)