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
2023-12-24
35
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、1. 2 million.
B、1. 4 million.
C、0. 8 million.
D、2 million.
答案
C
解析
掌握数字信息,并能够作简单推算。
转载请注明原文地址:https://tihaiku.com/zcyy/3302192.html
相关试题推荐
Scientistsclaimthatin50years’time,therewillbecomputersthatarelikely
Asweknow,beforescientistscomeupwithaneffectivetreatment,cancerissti
Shewassuchanenergeticspeakerthatsheheldourattentioneveryminuteofth
Scientistsaremakinghugestridesinbattlingoneofthetopthreekillerdisea
Toweakenthedamageforearthquakes,scientistsareworkingonwaystoenablea
Mostscientistsbelieveitislegitimatetouseanimalsinmedicalresearch.A、de
[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位外国友人在中国一所大学的讲话。Iwouldliketothankyou,Mr.Pres
[originaltext]下面你将听到的是一段有关全球经济发展的讲话。Theongoingeconomicglobalizationand
随机试题
Chooseoneappropriatewordfromthefollowingwordbanktofillintheblanknu
Changeoneletterineachofthefollowingtwowordstoproduceawell-knownphr
[img]2016m8s/ct_ecrbjz201411_ecrbjtc_0319_201608[/img][br]A、 B、 C、
下面你将听到一段有关非洲粮食安全问题的讲话。IampleasedtowelcomeyoutotheUnitedNations
Tostaywarmincoldweather,cold-bloodedanimalsmustexposeitselftoasourc
[originaltext]M:Hey,Sue.IwaswonderingifyoucouldfillmeinonMonday’s
WhyIntegrityMattersWhatisIn
下列哪些措施有助于防止义齿下沉性不稳定()A.制取解剖式印模 B.
单亲妈妈郭女士独自抚养15岁的女儿。女儿的叛逆心理较为严重,越来越不听她的话。最
机体组织液和血浆基本相同的成分是 A.小分子有机化合物B.大分子有机化合物
最新回复
(
0
)