首页
登录
职称英语
Commuter trains are often stuffy and crowded, and they frequently fail to ru
Commuter trains are often stuffy and crowded, and they frequently fail to ru
游客
2024-05-10
16
管理
问题
Commuter trains are often stuffy and crowded, and they frequently fail to run on time. As if that were not bad enough, Tsuyoshi Hondou, a physicist at Tohoku University in Japan, published a paper in 2002 that gave commuters【C1】______ another mason to feel uncomfortable. Dr Hondou examined mobilephone usage in enclosed spaces such as railway carriages, buses and lifts, all of which are, in 【C2】______ , metal boxes. His model predicted that a large number of passengers crowded together, all blathering, sending text messages, or browsing the web on their phones, could produce levels of electromagnetic radiation that【C3】______ international safety standards. That is because the radio waves produced by each phone are reflected off the metal walls of the carriage, bus or lift. Enough radiation escapes to allow the phone to communicate with the network, but the rest bathes the inside of the carriage with bouncing microwaves.
This sounds worrying. But maybe it isn’t after all. In a paper published recently in Applied Physics Letters, Jaime Ferret and Lucas Fernandez Seivane from the University of Oviedo in Spain along with colleagues from the Polytechnic University of Madrid and Telefonica Moviles, a Spanish mobile operator【C4】______ Dr Hondou’s findings. They conclude that the level of radiation is safe after all.
The【C5】______ addition to the new research is the effect of the passengers themselves. While each phone produces radiation that bounces around the car, the passengers absorb some of it, which has the effect of reducing the overall intensity, just as the presence of an audience changes the acoustics of a concert hall,【C6】______ it less reverberant. Dr Hondou’s model, in short, was valid only in the case of a single passenger sitting in an empty carriage with an active mobile phone on every seat.
While Dr Hondou acknowledged this in his original paper, he did not【C7】______ calculate the effect that leaving out the other passengers would have on the radiation level. As a result, say the authors of the new paper, he significantly overestimated the level of electromagnetic radiation. When one is sitting on a train, Dr Ferrer and his colleagues found, the most important sources of radiation are one’s own phone, and those of one’s 【C8】______ neighbours. The radiation from these sources far exceeds that from other phones or from waves bouncing around the carriage. And all these sources together produce a level of radiation within the bounds 【C9】______ by the ICNIRP, the international body that regulates such matters.
People concerned about the effects of mobile phone radiation are unlikely to take much comfort from Dr Ferrer’s results. They worry that even small amounts of microwave radiation within the ICNIRP’s limits may have adverse health effects. The evidence so far is ambiguous, 【C10】______ and sparse. Indeed, Dr Ferret says he was surprised at how little research has been done in this area.
A) exceed I) recently
B) quite J) specifically
C) consistent K) profit
D) inconsistent L) defined
E) dispute M) key
F) yet N) essence
G) represent O) immediate
H) making [br] 【C2】
选项
答案
N
解析
此处需要一个名词做介词宾语,in essence意为“本质上”。
转载请注明原文地址:https://tihaiku.com/zcyy/3592412.html
相关试题推荐
Commutertrainsareoftenstuffyandcrowded,andtheyfrequentlyfailtoru
Commutertrainsareoftenstuffyandcrowded,andtheyfrequentlyfailtoru
Commutertrainsareoftenstuffyandcrowded,andtheyfrequentlyfailtoru
Commutertrainsareoftenstuffyandcrowded,andtheyfrequentlyfailtoru
Ahealthylifeisfrequently_________________________.(被认为与开阔的田园和自家生产的食物联系在一
Crowsareprobablythemostfrequentlymetandeasilyidentifiablememberso
Crowsareprobablythemostfrequentlymetandeasilyidentifiablememberso
Crowsareprobablythemostfrequentlymetandeasilyidentifiablememberso
Crowsareprobablythemostfrequentlymetandeasilyidentifiablememberso
Actingissuchanover-crowdedprofessionthattheonlyadvicethatshouldb
随机试题
Some30,000localretail,cateringandtourismfirmsareexpectedtopartici
Insurance(保险)isthesharingofrisks.Nearlyeveryoneisexposedtoriskof
一般事故是指造成()人以下死亡,或者10人以下重伤,或者1000万以下100万
以下关于WAPI说法错误的有(30)。A.WAPI是一种安全协议 B.WAPI
在建设单位的下列行为中,违反法律规定的是( )。 A、将建筑工程肢解后发包给
利用“光控开关”和“声控开关”可以节约居民楼里楼道灯的用电。其中“光控开关”能在
人体合成及供应全身胆固醇能力最强的组织是( )。A.肾上腺与脑 B.肝与小肠
个人对征信的异议处理结果仍然有异议的,可以采取的处理方法有()。A.向法院提起
通过对机械设备的危害因素进行全面分析,采用智能设计手段,使机器在整个寿命周期内发
关于急性宫颈炎,下列何项是正确的A.急性宫颈炎常见病因是淋病奈瑟菌感染 B.淋
最新回复
(
0
)