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
UV Light Causes Skin Cancer Don’t laugh if you hear about kids hiding in their basement this summer. They might have been fr
UV Light Causes Skin Cancer Don’t laugh if you hear about kids hiding in their basement this summer. They might have been fr
admin
2012-07-29
56
问题
UV Light Causes Skin Cancer
Don’t laugh if you hear about kids hiding in their basement this summer. They might have been frightened by a recent report from Europe that liquid sunscreens don’t protect people from the sun’s harmful rays.
Researchers kept track of 631 children, some of whom used sunscreen and 46 . The researchers found that the kids who used sunscreen got more sun-caused moles than did the kids who didn’t use sunscreen. Kids with sun-caused moles are more likely to develop skin cancer later in life.
Did sunscreen harm the children? Probably not, the researchers concluded. They believe that the children relied too much on their sunscreen and stayed in the sun too long. Sunscreen is still safe to use, say skin experts, as long as it is used sensibly.
Solar Cares
Using sunscreen sensibly is more important than ever. Why? Skin experts like Martin Weinstock believe that 47 . Earth’s ozone layer appears to be getting thinner. Ozone is a gas. In the upper atmosphere, ozone blocks much of the sun’s harmful ultraviolet (UV) radiation. Polluting chemicals are thought to be destroying the ozone in some places.
Even though the world’s wealthy countries agreed to stop making polluting chemicals a few years ago, ozone is still disappearing. And that’s bad news, skin experts say, because UV light causes skin cancer, and skin cancer is the most common kind of cancer in the United States. More than a million new cases of skin cancer are showing up in the United States every year.
Scientists are looking at kids to reverse that trend. Why? Because getting too much sun when you’re a kid seems to set the stage for getting skin cancer when 48 . According to Weinstock, three-quarters of all skin cancers might never develop if people under the age of 18 avoided overexposure to the sun.
Glaring Facts
What happens when skin meets sun? Light rays, which come in varying wavelengths, strike the skin. Visible light consists of wavelengths 49 . Ultraviolet light consists of waves too short to be seen. UV light comes in several varieties, among them UVB and UVA. UVB wavelengths are slightly shorter than UVA wavelengths.
Scientists once thought that UVB light was harmful and that UVA light produced a healthful tan. But opinions have changed. Scientists still agree that UVB light causes sunburns. But now they suspect that both kinds of UV light damage the DNA of cells.
Moreover, scientists believe that either UVA light or UVB light or both weaken the body’s disease-fighting immune system. The body becomes less capable of repairing damaged cells, and such cells may go on to divide uncontrollably. In other words, 50
Three Little Words
To help people avoid getting harmed by the sun, the American Cancer Society has summed up its advice in three words: Slip, Slop and Slap. The words are short for "Slip on a shirt! Slop on the sunscreen! Slap on a hat!"
A they may become cancerous
B people can see
C you’re older
D UVA is different from UVB
E sunlight is growing more hazardous
F some of whom didn’t
选项
答案
C
解析
“空白”所在的句子的意思是:当你是儿童时过多地晒太阳似乎增加了在将来某时候患上皮肤癌的可能性。选项C的内容you’re older填入此处上下文意思很连贯。此外,平行结构when you’re a kid和when you’re older也是一种提示。
转载请注明原文地址:https://kaotiyun.com/show/pmmd777K
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
Youwillhearonepassageaboutscienceanddailylife.Beforeyoulisten,readthelistofstatements,fiveofwhicharesummar
Lookatthetenstatementsforthispart.Youwillhearapassageabout"CreditCardsHistory".Youwilllistentoittwice
CONVERSATION2(Questions5-8)Thepatient’sname:【L5】______JohnsonThedoctor’sname:【L6】______Appointmenttime:at【L7】______a
FRIENDSHIP0Ibelievethatnothingmattersasmuchashavingacoupleofreallygood00friends.Theyhelpyoufeell
FRIENDSHIP0Ibelievethatnothingmattersasmuchashavingacoupleofreallygood00friends.Theyhelpyoufeell
ANEWCRUISESHIPOneofthebiggestpassengershipsinhistory,theIslandPrincess,carriespeopleoncruisesaroundtheCa
Itiswell-knownthattimeismoney.Thatisthereasonwhyalmosteveryonemakesfulluseoftheirtime.
ThereisalwaysexcitementattheOlympicGameswhenanathletebreaksapreviousrecordofperformance.
Theauthormentions"pick-me-up"toindicatethatTheauthorofthispassageprobablyagreesthat
随机试题
月经周期为28天的妇女,要取子宫内膜活检测定是否有排卵,最好在周期的第
试论述学校和其他教育机构的义务。
《春江花月夜》一诗中由人生感叹转向写游子思妇的一句诗是()
下列关于气机失常病机的描述,不确定的是
患者,女,30岁,大叶性肺炎,遵医嘱给予补液抗感染治疗。在输液过程中,患者自诉胸闷异常不适,随之出现呼吸困难。查体:口唇发绀,听诊心前区可闻及响亮持续的“水泡声”。应立即采取的措施是
除另有规定外,一般片剂的崩解时限是泡腾片按规定方法检查6片,每片完全崩解的时间是
关于再审裁判,下列说法正确的是:()
影响企业筹资、投资和收益分配的法律法规是()。
某校的学生刚好排成一个方阵,最外层的人数是96人,问这个学校共有学生()。
通过符号的任意性特点,我们可以解释为什么人类社会有各种各样的语言。()
最新回复
(
0
)