首页
登录
职称英语
What is the speaker’s main topic? [br] [originaltext] Italian scientists hav
What is the speaker’s main topic? [br] [originaltext] Italian scientists hav
游客
2025-01-17
28
管理
问题
What is the speaker’s main topic? [br]
Italian scientists have raised new health concerns about the safety of using mobile phones, with research showing radio waves from the handsets makes cancerous cells grow more aggressively. When Fiorenzo Marinelli and his colleagues at the National Research Council in Bologna exposed leukemia cells in the laboratory to 48 hours of continuous radio waves they initially killed the cancer cells but then made the surviving tumor cells replicate more rapidly.
"We don’t know what the effects would be on healthy human cells," Marinelli told New Scientist magazine. In the Italian study, after 24 hours 20 percent more leukemia cells died than healthy cells but longer exposure to the radio waves triggered genes in the surviving cancer cells to divide aggressively.
The results of the study do not show any direct threat to human health but they support the belief of some scientists who say radiation can damage DNA and destroy the cell repair system, thus making tumors more deadly. But animal studies, including recent research by Australian scientists at the Institute of Medical and Veterinary Science in Adelaide, have shown that radiation from mobile phones does not trigger the growth of tumors.
The WHO (i. e. , The World Health Organization) has called for more research into the potential health hazards of mobile phones and has urged people to limit their use of them. A British government inquiry, which concluded that there was no evidence that mobile phones are a danger to health, has advised parents to discourage their children, whose brains are still developing, from using them excessively.
选项
A、precautious
B、skeptical
C、approving
D、indifferent
答案
A
解析
正确识别某些重要表达后面蕴涵的意义。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3917041.html
相关试题推荐
Scientistshaveclaimsthatthereisa________ofwildlifeintheAmazonRainFor
Scientistsaremakinghugestridesinbattlingoneofthetopthreekillerdisea
Toweakenthedamageforearthquakes,scientistsareworkingonwaystoenablea
ScientistshaveunlockedtheaestheticmysterybydetermininghowLeonardoDaVi
Thankyouall.Mr.VicePresident;SecretaryGates;MadamSpeaker;Justices
[originaltext]下面你将听到的是一段有关中国经济社会发展的讲话。中国的改革开放已经走过了26个年头。26年来,中国发生了翻天覆地的变化。
[originaltext]下面你将听到一段介绍北京申奥功臣何振梁的讲话。7月13日晚,在莫斯科国际贸易中心,当国际奥委会主席萨马兰奇宣布北京获得2
[originaltext]下面你将听到的是一段介绍美国著名导演斯皮尔伯格的讲话。StevenSpielberg’sfirstfilmswe
[originaltext]下面你将听到的是一段有关全球经济发展的讲话。Theongoingeconomicglobalizationand
[originaltext]下面你将听到的是一段有关儿童发展的讲话。儿童的生存、保护和发展是提高人口素质的基础,直接关系到一个国家和民族的前途与命运
随机试题
Whereistheman?[br][originaltext]F:CanIhelpyou,sir?M:Oh,yes.Iwant
[originaltext]Thejudgehaswarnedyoungwomencriminalsthattheycannotho
WhichofthefollowingadverbscanNOTbeusedtocomplete"itis______toodiffi
Ifyourcredit(信誉)isgood,youwillbeallowed(use)______thecreditcard.to
通过专业文化行为和决策帮助服务对象改变其生活方式,或塑造一个全新的有利于健康的生
施工安全第一是工程项目各参与单位必须遵守的基本原则,有关安全作业环境及安全施工措
消费者王某在展销会购买了一件商品,回家使用两天后发现存在严重质量问题,而展销会已
教学与研究相结合是我国古代书院的办学特色之一。
共用题干 第三篇OntheTrialoftheHoneyBadge
经财政部汇总,2010年中央行政单位、事业单位和其他单位“三公”支出合计94.7
最新回复
(
0
)