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
64
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、The number of healthy cells will keep declining as more and more of them die.
B、The number of healthy cells will initially drop before recovering rapidly.
C、The number of healthy cells will be on steady increase throughout the process.
D、The scientists have not yet arrived at any conclusion on this issue.
答案
D
解析
注意掌握重要人物的引语部分,该部分往往是包含重要的细节信息。
转载请注明原文地址:http://tihaiku.com/zcyy/3302193.html
相关试题推荐
Whatisthespeaker’smaintopic?[br][originaltext]Italianscientistshav
Whoweretakenhostageinthereportedkidnapping?[br][originaltext]Unide
Whoweretakenhostageinthereportedkidnapping?[br][originaltext]Unide
Whoweretakenhostageinthereportedkidnapping?[br][originaltext]Unide
Whoweretakenhostageinthereportedkidnapping?[originaltext]Unidentifie
Whatisthemaintopicofthistalk?[br][originaltext]Toquicklyreviewt
Whatisthemaintopicofthistalk?[br][originaltext]Toquicklyreviewt
Cheapproteinsubstitutesfrommilk,eggsandmeat________.[br][originaltext]
Cheapproteinsubstitutesfrommilk,eggsandmeat________.[br][originaltext]
Cheapproteinsubstitutesfrommilk,eggsandmeat________.[originaltext]In
随机试题
[originaltext]Pianosarenormallyfoundinbuildingforobviousreasons.Howeve
InwhichcitywouldyoufindtheGoldenGateBridge?A、SanFrancisco.B、Dallas.C
氧分压在组织处越低Hb对氧的亲合越小。()
点对点协议PPP中LCP的作用是()。A.包装各种上层协议 B.封装承载的网络
茶叶有不同的分类方法,其中全发酵茶是指( )。A.绿茶 B.红茶 C.黄茶
社会主义核心价值体系的基本内容包括 A.马克思主义指导思想 B.中国特色社会
患者血BUN增髙,血Cr正常,BUN/Cr=13,提示 A.慢性肾小球肾炎
基于认知的选择性,当消费者面对众多营销刺激时,一般更容易选择(B)的外部
商业银行在对单一法人客户进行中长期授信时,需要作出预测和分析的有()。A.资金
期货公司监督管理办法适用于中华人民共和国境内和境外设立的期货公司。()
最新回复
(
0
)